Peel Shrimp, leaving shell on tail section. Lay on back. (the shrimp, not you!)
With sharp knife, split almost through (butterfly cut). De-vein.
Mix celery, onion and margarine in a 1 quart casserole. Microwave 3 minutes on high or till onion is transparent. Stir in remaining ingredients. Brush shrimp with melted margarine.
Spoon 1 Tbsp. of mixture into butterflied area of shrimp. Put in baking dish with tail resting straight up on side of dish. Microwave 3 minutes on high or til shrimp are opaque. Don't overcook. Time varies slightly with size of shrimp. Makes 4 servings. 200 calories per serving.