Spoon refried beans into medium microwavable bowl; cover and microwave on High 2 minutes; stir. Microwave for additional 30 seconds at a time until hot. Set aside. Place tortillas between damp paper towels, place on microwavable plate, microwave on High 45 to 60 seconds or until hot. Spread beans on tortillas to within 1/2 inch of edges. Top with cheese, salsa, sour cream and lettuce. Roll up. Cut in half diagonally.