HEAT oven to 350ºF.
COOK and stir bacon in large skillet until crisp; drain. Brown ground beef with onions and peppers in same skillet. Remove from heat; stir in bacon, tomato sauce, olives and raisins.
SPOON into 13x9-inch baking dish sprayed with cooking spray. Prepare muffin batter as directed on package; stir in cheese. Spread over meat mixture.
BAKE 20 min. or until toothpick inserted in center of cornbread comes out clean. Serve topped with sour cream.