Heat oven to 450°F. In small bowl, stir ketchup and brown sugar until mixed; reserve 1/4 cup for topping. In large bowl, stir remaining ingredients and remaining ketchup mixture until well mixed.
Spray 13x9-inch pan with cooking spray. Place meat mixture in pan; pat into 12x4-inch rectangle. Cut lengthwise down center and then crosswise into sixths to form 12 loaves. Separate loaves, using spatula, so no edges are touching. Brush loaves with reserved 1/4 cup ketchup mixture.
Bake 18 to 20 minutes or until loaves are no longer pink in center and meat thermometer inserted in center of loaves reads 160°F.