Easy Beef Quesidillas

6 oz. Deli roast beef, thinly sliced
1 small Onion, thinly sliced
1/4 cup Green bell pepper, chopped
1/2 cup prepared medium Salsa, divided
1 oz. Colby cheese, shredded
2 oz. Monterey jack cheese, shredded
4 Flour Tortillas (7 inch diameter)

Place onion and green pepper in a small microwave-safe bowl. Cover, venting one corner, and microwave at HIGH 3 to 4 minutes. Stir in 3 Tbs. salsa; reserve. Sprinkle an equal amount of cheese evenly on each tortilla; arrange beef over cheese and top with vegetable mixture. Fold tortillas over to close.
Meanwhile heat nonstick frying pan (or use vegetable spray) over medium heat 5 minutes. Heat two quesadillas in pan 2 to 2 ½ minutes, turning once; repeat with remaining quesadillas. Serve with remaining salsa.