In a large skillet over medium-high heat, heat oil until shimmering. Add peppers, onions, mushrooms, garlic powder, and onion powdwer.
Cook, tossing occasionally, until slightly softened but still tender-crisp, about 8 to 10 minutes.
Add salt and pepper to taste.
Serve immediately, and save leftovers in the refrigerator for up to 5 days.
Nutritional information is approximate and was calculated using a recipe nutrition label generator.
If you hate mushrooms, you can omit them from the recipe.
Any color/ variety of onion and bell pepper work in this recipe.