Baked Tomato Frittata

Preheat oven to 375°F. Beat egg whites with eggs in a medium bowl. Add the salt.

Set a small skillet over medium heat. Coat with cooking spray and add the egg mixture, tomato, and feta. Cook for 4 minutes or until the edges of the eggs are firm. Transfer to the hot oven for 5 minutes, or until the middle no longer jiggles when gently shaken.

Remove from the oven and let it rest for 5 minutes. Slice and serve.