Heat a nonstick skillet coated with cooking spray over medium-high heat. Add red bell pepper, onion, and sausage; cook 4 minutes or until browned, stirring to crumble sausage. Add egg substitute; cook 2 minutes, stirring frequently. Remove from heat; stir in reduced-fat cheddar cheese and 2 tablespoons salsa. Cover mixture and let stand 2 minutes.
Heat tortillas according to package directions. Spoon half of egg mixture down center of each tortilla; roll up. Serve with remaining salsa and sour cream.