Coarse kosher salt and freshly ground black pepperto taste
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 or non-stick skillet over medium high heat. Once hot, add the marinated vegetables and cook, stirring, until just tender, 5-7 minutes. Spoon into warmed tortillas and top with avocado, lime juice, and cilantro if desired.
Nutrition information is an estimate without additional toppings like avocado, lime juice, or cilantro.
Tips for customizing
Use a big romaine or butter lettuce leaf instead of the tortilla to make a vegan fajita lettuce wrap
Serve on corn tortillas to make them gluten-free
Top with cheese and sour cream to make vegetarian fajitas
Swap in your favorite veggies such as cauliflower or carrots
Serve cooked, sliced chicken or beef on the side for meat eaters