Ingredients
For the Beef Marinade:
- 1 pound flank steak or sirloin steak, thinly sliced against the grain
- 2 tablespoons soy sauce
- 1 tablespoon cornstarch
- 1 tablespoon rice wine vinegar (or dry sherry)
- 1 teaspoon sesame oil
- 1/2 teaspoon ground ginger
- 1/4 teaspoon black pepper
For the Stir-Fry:
- 2 medium zucchini, halved lengthwise and sliced
- 1 red bell pepper, cored, seeded, and sliced
- 1/2 yellow onion, thinly sliced
- 2 cloves garlic, minced
- 1 tablespoon vegetable oil (or avocado oil)
- 2 tablespoons soy sauce (or tamari for gluten-free)
- 1 tablespoon oyster sauce (optional, adds depth of flavor)
- 1 tablespoon hoisin sauce
- 1 teaspoon sesame oil
- 1/2 teaspoon red pepper flakes (optional, for heat)
- 1/4 cup water or chicken broth
- 1 tablespoon cornstarch (for thickening)
- Sesame seeds, for garnish (optional)
- Chopped green onions, for garnish (optional)
Making Magic: The Step-by-Step Instructions
Step 1: Marinate the Beef
- In a medium bowl, whisk together the soy sauce, cornstarch, rice wine vinegar, sesame oil, ginger, and pepper.
- Add the sliced beef to the marinade and toss to coat evenly.
- Let the beef marinate for at least 15 minutes, or up to 30 minutes in the refrigerator. This tenderizes the beef and infuses it with flavor.
Step 2: Prep Your Veggies
- While the beef is marinating, prepare your vegetables. Slice the zucchini, bell pepper, and onion. Mince the garlic. Having everything ready to go before you start cooking is crucial for a quick and successful stir-fry.
Step 3: Stir-Fry Time!
- Heat the vegetable oil in a large skillet or wok over high heat. The pan should be very hot before you add the beef to ensure it sears properly.
- Add the marinated beef to the hot pan in a single layer (work in batches if necessary to avoid overcrowding the pan).
- Stir-fry the beef for 2-3 minutes, or until it’s browned on all sides and cooked through. Remove the beef from the pan and set aside.
- Add the sliced zucchini, bell pepper, and onion to the pan. Stir-fry for 3-5 minutes, or until the vegetables are tender-crisp.
- Add the minced garlic and red pepper flakes (if using) to the pan and stir-fry for another 30 seconds, or until fragrant.
Step 4: Sauce It Up!
- In a small bowl, whisk together the soy sauce, oyster sauce (if using), hoisin sauce, sesame oil, water or chicken broth, and cornstarch.
- Pour the sauce over the vegetables in the pan and bring to a simmer. Cook for 1-2 minutes, or until the sauce has thickened slightly.
- Return the cooked beef to the pan and toss to coat with the sauce.
- Heat through and then remove from heat.
Step 5: Garnish & Serve
- Garnish with sesame seeds and chopped green onions, if desired.
- Serve the Zucchini Beef Stir-Fry immediately over rice, noodles, or cauliflower rice for a low-carb option.
Zucchini Beef Stir-Fry: Your Questions Answered
Can I use ground beef instead of steak?
Absolutely! While steak gives you that classic stir-fry texture, ground beef works well too. If you’re looking for Ground Beef Healthy Dinner Recipes or even Ground Beef Diet Recipes, this is a great way to adapt the recipe. Brown the ground beef thoroughly before adding the vegetables, and drain off any excess grease. You might need to adjust the cooking time slightly.
What other vegetables can I add?
The beauty of a stir-fry is its versatility. Feel free to add other vegetables you enjoy, such as broccoli florets, carrots, snap peas, mushrooms, or bok choy. Just keep in mind that different vegetables have different cooking times, so add them to the pan in order of how long they take to cook. If you love zucchini and chicken together, you might also like Chicken Zucchini Stir Fry.
How can I make this recipe gluten-free?
To make this Zucchini Beef Stir-Fry gluten-free, simply use tamari instead of soy sauce, as tamari is typically gluten-free. Also, double-check that your hoisin sauce is gluten-free, as some brands may contain wheat. Oyster sauce is often gluten-free, but it’s always a good idea to check the label.
Is this recipe good for meal prep?
Yes! This Zucchini Beef Stir-Fry is perfect for Meal Prep For The Week No Carb options. Cook the stir-fry as directed, then let it cool completely before storing it in airtight containers in the refrigerator. It will keep for up to 3-4 days. When you’re ready to eat, simply reheat it in the microwave or in a skillet over medium heat. Consider packing the rice or noodles separately to prevent them from getting soggy.
Can I make this recipe ahead of time?
You can definitely prep some components ahead of time to make the cooking process even faster. You can slice the beef and marinate it the night before, as well as chop all the vegetables and store them in separate containers. The sauce can also be mixed ahead of time and stored in the refrigerator. Then, when you’re ready to cook, all you have to do is stir-fry!
Tips and Tricks for Stir-Fry Success
High Heat is Key
The key to a great stir-fry is high heat. Make sure your pan is screaming hot before you add the beef and vegetables. This will ensure that they sear properly and don’t get soggy. If your pan isn’t hot enough, the ingredients will steam instead of stir-fry.
Don’t Overcrowd the Pan
Overcrowding the pan will lower the temperature and cause the ingredients to steam. Cook the beef and vegetables in batches if necessary to avoid overcrowding. This will ensure that everything cooks evenly and has a nice sear.
Prepare Your Ingredients in Advance
Stir-frying is a fast cooking method, so it’s important to have all your ingredients prepped and ready to go before you start cooking. This means slicing the beef, chopping the vegetables, and mixing the sauce. Having everything ready to go will make the cooking process much smoother and more efficient.
Adjust the Sauce to Your Taste
The sauce is the heart of the stir-fry, so it’s important to adjust it to your liking. If you prefer a sweeter sauce, add a little extra hoisin sauce or honey. If you like it spicier, add more red pepper flakes or a dash of sriracha. Don’t be afraid to experiment and find the perfect balance of flavors for your palate.
Serve Immediately
Stir-fries are best served immediately, while the beef and vegetables are still hot and the sauce is glossy. If you let it sit for too long, the vegetables will lose their crispness and the sauce will start to thicken. If you’re not ready to eat right away, keep the stir-fry warm in a low oven or in a covered dish.
Expanding Your Stir-Fry Repertoire
Once you’ve mastered this Zucchini Beef Stir-Fry, you’ll be ready to explore other delicious stir-fry variations. Consider trying a Honey Garlic Beef & Broccoli for a sweet and savory twist, or a classic Chinese Beef And Broccoli. For a bite-sized treat, try Garlic Butter Beef Bites, which can also be served over rice or noodles. You could even try Chinese Beef & Broccoli.
Embrace the Stir-Fry Life
This Zucchini Beef Stir-Fry is more than just a recipe; it’s a gateway to a world of quick, healthy, and flavorful meals. With a few simple ingredients and some basic techniques, you can create a delicious and satisfying dinner in minutes. So, grab your wok (or skillet), gather your ingredients, and get ready to stir-fry your way to culinary success. Enjoy!Can I substitute ground beef for steak in this recipe?
Yes, you can use ground beef instead of steak. Brown the ground beef thoroughly before adding the vegetables and drain off any excess grease. You may need to adjust the cooking time slightly.
What’s the key to a successful stir-fry?
High heat is crucial for a great stir-fry. Ensure your pan is very hot before adding the beef and vegetables to ensure they sear properly and don’t get soggy.
How can I make this recipe gluten-free?
To make the stir-fry gluten-free, use tamari instead of soy sauce, and double-check that your hoisin sauce is gluten-free as some brands may contain wheat.
Can I prepare parts of this recipe in advance?
Yes, you can slice the beef and marinate it the night before, chop all the vegetables and store them separately, and mix the sauce ahead of time. This will make the cooking process even faster.

Easy Zucchini Beef Stir-Fry
Equipment
- Medium bowl
- Whisk
- Large Skillet or Wok
- Cutting board
- Knife
- Small bowl
Ingredients
- 1 pound flank steak or sirloin steak, thinly sliced against the grain
- 2 tablespoons soy sauce
- 1 tablespoon cornstarch
- 1 tablespoon rice wine vinegar or dry sherry
- 1 teaspoon sesame oil
- ½ teaspoon ground ginger
- ¼ teaspoon black pepper
- 2 medium zucchini, halved lengthwise and sliced
- 1 red bell pepper, cored, seeded, and sliced
- ½ yellow onion, thinly sliced
- 2 cloves garlic, minced
- 1 tablespoon vegetable oil or avocado oil
- 2 tablespoons soy sauce or tamari for gluten-free
- 1 tablespoon oyster sauce optional, adds depth of flavor
- 1 tablespoon hoisin sauce
- 1 teaspoon sesame oil
- ½ teaspoon red pepper flakes optional, for heat
- ¼ cup water or chicken broth
- 1 tablespoon cornstarch for thickening
- Sesame seeds, for garnish optional
- Chopped green onions, for garnish optional
- Cooked rice or noodles, for serving
Instructions
- In a medium bowl, whisk together the soy sauce, cornstarch, rice wine vinegar, sesame oil, ginger, and pepper.
- Add the sliced beef to the marinade and toss to coat evenly.
- Let the beef marinate for at least 15 minutes, or up to 30 minutes in the refrigerator.
- While the beef is marinating, prepare your vegetables. Slice the zucchini, bell pepper, and onion. Mince the garlic.
- Heat the vegetable oil in a large skillet or wok over high heat.
- Add the marinated beef to the hot pan in a single layer (work in batches if necessary to avoid overcrowding the pan).
- Stir-fry the beef for 2-3 minutes, or until it’s browned on all sides and cooked through. Remove the beef from the pan and set aside.
- Add the sliced zucchini, bell pepper, and onion to the pan. Stir-fry for 3-5 minutes, or until the vegetables are tender-crisp.
- Add the minced garlic and red pepper flakes (if using) to the pan and stir-fry for another 30 seconds, or until fragrant.
- In a small bowl, whisk together the soy sauce, oyster sauce (if using), hoisin sauce, sesame oil, water or chicken broth, and cornstarch.
- Pour the sauce over the vegetables in the pan and bring to a simmer. Cook for 1-2 minutes, or until the sauce has thickened slightly.
- Return the cooked beef to the pan and toss to coat with the sauce.
- Heat through and then remove from heat.
- Garnish with sesame seeds and chopped green onions, if desired.
- Serve immediately over rice, noodles, or cauliflower rice.
