Ingredients

• cooking spray
• 3 egg whites
• salt and ground black pepper to taste
• 1/4 cup chopped fresh spinach, or more to taste
• 6 cherry tomatoes, sliced
• 2 tablespoons crumbled feta cheese

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Instructions

1. Heat a skillet over medium heat and spray with cooking spray.
2. Whisk egg whites with salt and pepper in a bowl. Pour egg mixture into the heated skillet and swirl until eggs cover entire bottom of skillet; cook for 1 to 2 minutes. Arrange spinach, tomatoes, and feta cheese in the middle of the eggs. Cook until edges of eggs begin to curl up, 2 to 3 more minutes. Loosen omelet from the skillet using a spatula and fold in half; continue cooking until cheese is melted, 2 to 3 more minutes.