Cut 4 (15x14-inch) pieces of parchemnt paper; fold in half crosswise, creasing frimly. Trim each piece of parchment into a large heart shape. Unfold parchment, and place on backing sheets. Place 1 fillet on each parchment hear, near the crease. Combine cheese and next 4 ingredients; sprinkle evenly over fish. Arrange tomato and onion slices over cheese mixture; spirnkle with bell peppers.

Fold over remaning half of each parchment heart. Starting with rounded edge, pleat and crmp edges together to seal. Twist ends tighly to seal. Coat tops of parchment hearts with cooking spray.

Bake at 400F for 12 minutes or until puffed and lightly browned. Place on individual serving plates, and cut open. Serve immediatly.