Preheat oven to 175 degrees F. Heat olive oil in a large skillet over medium heat (cast iron works great). Add peppers and onions and cook, stirring frequently, for 7-8 minutes until onions begin to caramelize and peppers have softened. Remove veggies from pan and add steak. Turn heat to med-high and cook steak until lightly browned, this only takes a minute or so on higher heat if sliced thin. Add peppers and onions back to skillet and place in the warm oven to keep warm while you scramble your eggs. Heat another skillet on medium heat and spray with olive oil spray. Combine eggs with egg whites and whisk until blended. Pour eggs into pan and scramble until cooked through. Fill each tortilla with an even amount of eggs, then top with steak and pepper blend. Season with salt and pepper. Add salsa and fresh avocado if desired.