Mushroom Stuffed Round Steak
["1 1/2 lb. round steak", "meat tenderizer", "1 tsp. butter or margarine", "seasoned salt and pepper", "1 (3 oz.) can sliced mushrooms, drained", "1 small onion, chopped", "1 Tbsp. parsley, chopped", "1 stalk celery, chopped", "4 potatoes", "8 small onions", "1 envelope dry soup mix (beef flavored)"]
["Pound steak; sprinkle with tenderizer.", "Prick with fork. Spread with butter; season.", "Mix next 4 ingredients and spread on steak.", "Roll up and secure with toothpicks.", "Put in large shallow baking dish.", "Arrange vegetables around steak.", "Add 1 cup water to soup mix.", "Cover.", "Bake at 325\u00b0 for 1 1/2 hours."]
["butter", "salt", "mushrooms", "onion", "parsley", "celery", "potatoes", "onions", "beef"]