Wash and drain oysters. Roll in cracker crumbs. Lay on a lightly oiled cookie sheet. Melt margarine; add lemon juice. Spoon mixture on top of each oyster. Sprinkle with salt and pepper. Broil 6 to 10 minutes or until browned. Turn oysters; spoon on remaining margarine mixture. Season and complete the broiling. One serving (4 oysters) may be exchanged for two third bread exchange, 2 meats and -20ºC at exchanges or 11 grams carbohydrate, 16 grams protein and 17 grams fat. Makes 8 servings.