Beef & Cheese Quesadillas

1 lb. lean ground beef
1/2 cup chopped onion
3/4 cup chunky salsa
2 cups shredded cheese
10-12 flour tortillas

Brown beef with onion. Drain. Mix in salsa and cheese. If freezing, place meat mixture in a freezer bag. Include a package of flour tortillas with this meal. Otherwise, spoon approximately 1/2 cup of meat mixture on one half of tortilla. Fold tortilla in half to close. Arrange quesadillas on baking sheet. Lightly spray tops of tortillas with cooking spray. Bake at 450 degrees for 8 minutes or until lightly browned.