1) In a small mixing bowl, lightly beat egg and egg whites. Add 1 tablespoon of salsa, blend well.
2) Lightly coat a medium nonstick skillet with cooking spray. Saute diced bell pepper and onion over medium heat for 2 to 3 minutes until softened. Add the egg mixture and cook with vegetables, stirring occasionally, until set.
3) Place pita on a plate and spoon the egg mixture on it. Top with cheddar cheese and microwave for about 20 seconds, until the cheese melts.
4) Top pita pizza with remaining salsa, serve and enjoy!