Chop onion, mushrooms, broccoli and tomato into small pieces. Drain and rinse beans; slice avocado and peaches.
Whisk eggs and egg whites together. Spray a large skillet with cooking spray and heat over medium. Sauté the veggies for 3-4 minutes, stirring to prevent sticking.
Add the eggs and stir to scramble until no longer runny. Divide egg mixture evenly among tortillas and top off each with some beans and sliced avocado. (Ingredients may be split in half and cooked in two batches if necessary.)