1. Wrap tortillas loosely with aluminum foil, and place in a 250° oven for 10 minutes.
2. Meanwhile, cook sausage in a large skillet over medium-high heat, stirring often, 8 minutes or until sausage crumbles and is no longer pink; drain, remove sausage from skillet, and pat dry with paper towels. Wipe skillet clean. Reduce heat to medium.
3. Whisk together eggs and 2 Tbsp. water. Coat same skillet with cooking spray; add egg mixture, and cook, without stirring, 2 to 3 minutes or until eggs begin to set on bottom. Gently draw cooked edges away from sides of pan to form large pieces. Cook, stirring occasionally, 2 minutes or until eggs are thickened but still moist. (Do not overstir.)
4. Spoon sausage and eggs evenly onto tortillas, and sprinkle with cheese; roll up tortillas. Serve with salsa and sour cream, if desired.
Note: To lighten, substitute 1 1/2 cups egg substitute for eggs and reduced-fat pork sausage for sausage.