
This Low Carb Stir Fry Zucchini with Mushrooms and Onions is my answer to hectic weeknights when meals need to be nourishing yet effortless. With just fresh zucchini, earthy mushrooms, and golden caramelized onions, this stir fry brings vibrant flavor and wholesome satisfaction without piling on carbs. It is a perfect go-to whether you want a healthy side or a veggie-packed main you can customize in so many ways.
I first made this stir fry on a summer night when the garden zucchini was out of control and there was no time for fuss. Now it is a kitchen staple and gets rave reviews from anyone who tries it.
Ingredients
- Zucchini: sliced into half moons brings mild flavor and beautiful texture Look for firm squash with shiny unblemished skin for best results
- Mushrooms: either button or cremini add a deep woodsy taste Seek out mushrooms that are plump and dry not slimy or wrinkled
- Onion: sliced thin lends subtle sweetness and helps everything caramelize nicely Yellow or sweet onions offer the best flavor here
- Olive oil: coats the vegetables and helps them sauté evenly Use a high quality extra virgin oil for rich taste
- Garlic: minced provides big aromatic punch Choose fresh cloves that are firm and free from green sprouts
- Soy sauce or tamari: if gluten free gives the dish umami and complexity Go for low sodium if you want to control saltiness
- Ground black pepper: adds a gentle kick and keeps things balanced Always use freshly ground if possible
- Red pepper flakes: completely optional but perfect for a little heat Use sparingly or to taste
- Salt: rounds out all the flavors Start light then adjust after seasoning
- Fresh parsley: chopped for garnish brings color and a pop of freshness Choose bright green leaves without bruises
Step-by-Step Instructions
- Prepare the Vegetables:
- Slice zucchini into uniform half moons so everything cooks evenly Slice mushrooms and onions as thin as you like for quick caramelization Mince the garlic quite finely so it spreads its flavor
- Heat the Pan:
- Set a large skillet or wok over medium high heat Add olive oil and let it get hot and shimmering This prevents sticking and helps the flavors build
- Sauté Onions and Mushrooms:
- Drop in the sliced onions first and cook for about three or four minutes Stir often until they soften and start turning translucent Add the mushrooms next and stir occasionally As they release liquid their flavor deepens and onions caramelize after about five minutes
- Add Zucchini and Garlic:
- Toss in the zucchini slices and minced garlic Stir well to mix them in with everything Continue cooking another five or six minutes Stir occasionally so the zucchini cooks through but still keeps a bit of crunch
- Season the Stir Fry:
- Once the vegetables are nearly done stir in the soy sauce black pepper red pepper flakes if using and a touch of salt Mix well so all the vegetables are coated and heated through in the last minute or two
- Finish and Serve:
- Take the pan off the heat Sprinkle fresh chopped parsley over the top Serve hot as an easy side or spoon into bowls for a vegetable main

This dish is such a winner because even my pickiest eater devours it The mushrooms really take center stage for me They get so savory and juicy with just that little bit of browning—reminds me of the way my mom cooked mushrooms when I was young
Storage Tips
Let any leftovers cool fully before placing them in an airtight container Refrigerate for up to three days When reheating use a skillet over medium heat to bring back a little crispness to the veggies Microwaving works but will soften the texture
Ingredient Substitutions
Feel free to swap button or cremini mushrooms for shiitake or portobello for a richer flavor profile You can also use yellow squash instead of zucchini or swap the onion for shallots If soy is a concern coconut aminos step in perfectly for soy sauce without gluten or soy
Serving Suggestions
Pile this stir fry next to grilled chicken shrimp or tofu for a protein rich meal It is also a satisfying topping for cauliflower rice or eggs especially for brunch I sometimes wrap it in a large collard leaf for a veggie wrap lunch

Cultural Context
Stir fry techniques hail from East Asian kitchens where fast high heat cooking keeps vegetables vibrant and crisp This version strips the dish down to basics and lets fresh produce shine with just a gentle hint of umami and spice
Frequently Asked Questions
- → What type of mushrooms work best?
Button or cremini mushrooms are ideal, but shiitake or portobello varieties give a deeper flavor and work well too.
- → How do I keep the zucchini from getting soggy?
Cook zucchini last over high heat and avoid overcrowding the pan. This keeps the texture crisp and prevents steaming.
- → Can I add protein to this dish?
Yes, try adding cooked chicken, tofu, shrimp, beef, or even scrambled eggs for a more filling main course.
- → What oil works best for stir-frying vegetables?
Use oil with a high smoke point like olive oil, avocado oil, or butter for best results and flavor.
- → How should leftovers be stored and reheated?
Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in a skillet to retain texture and avoid sogginess.