Queso frescocotija, cheddar, or Monterey jack cheese (optional)
In a large bowl, combine the onions, bell peppers, broccoli, and mushrooms.
In a glass measuring cup, combine the oil and spices. Pour over the vegetable mixture and stir well.
Heat a large cast iron skillet or wok over medium high heat. Once hot, add the marinated vegetables and cook, stirring, until just tender, 5-7 minutes. Season with salt and pepper. Spoon into warmed tortillas and top with cheese, avocado, lime juice, cilantro, and sour cream if desired.
Nutrition information is for cooked veggies without tortillas or toppings.