Heat olive oil in a skillet over medium heat.
Cook onion and red bell pepper until soft and fragrant.
Add spinach and cook until fully wilted.
Pour in egg whites and stir gently.
Cook until egg whites are soft, fluffy, and fully set.
Season with garlic powder, salt, and black pepper.
Remove from heat and stir in feta cheese.
Warm tortilla in a dry pan until soft and flexible.
Add filling to the center of tortilla.
Fold sides and roll tightly into a wrap.
Toast wrap in skillet until lightly golden.
Slice and serve warm.