SPRAY large skillet with cooking spray. Add chicken; cook on medium-high heat 5 min., stirring frequently.

ADD peppers and onions; cook 4 to 5 min. or until vegetables are crisp-tender. Stir in salsa and beans; cook an additional 3 min. or until heated through, stirring occasionally.

SPOON 1/4 cup of the chicken mixture onto half of each tortilla. Sprinkle evenly with cheese. Fold tortillas in half. Spray second large skillet with cooking spray. Heat on medium heat. Add quesadillas, in batches; cook 2 min. on each side or until lightly browned on both sides. Fold each quesadilla in half or cut into wedges to serve.