Swank Porterhouse Steak
["1 (2 1/2 to 3 lb.) Porterhouse or sirloin steak (2 inches thick)", "3/4 c. finely chopped Bermuda onion", "dash of salt, pepper and celery salt", "3 Tbsp. Claret wine", "2 Tbsp. soy sauce", "1/4 c. butter", "1 (3 oz.) can sliced mushrooms, broiled and drained (2/3 c.)"]
["Slash fat edge of steak; don't cut into meat.", "Slitting from fat side, cut pocket in each side of lean almost to the bone. Combine salt, garlic, pepper and celery salt.", "Put in pocket in steak.", "Mix Claret and soy sauce; brush on steak.", "Grill over hot coals a total of 25 minutes or until done to your liking.", "Turning once, brush occasionally with soy mixture.", "Makes 4 delicious servings."]
["Bermuda onion", "salt", "Claret wine", "soy sauce", "butter", "mushrooms"]