Chafing Dish Mushroom Dip
["1 lb. white mushrooms", "4 Tbsp. butter", "1 Tbsp. grated onion", "1 Tbsp. Dijon mustard", "1/2 tsp. salt", "1/8 tsp. garlic powder", "2 Tbsp. dried parsley, finely chopped", "1/4 tsp. Tabasco", "1 c. sour cream", "Melba rounds"]
["Wash, dry and slice lengthwise mushrooms.", "Melt butter, add remaining ingredients except sour cream and cook over medium heat 7 to 10 minutes.", "Fold in sour cream.", "Taste test for more salt. Serve hot on Melba rounds.", "Yields 72 servings."]
["white mushrooms", "butter", "onion", "mustard", "salt", "garlic powder", "parsley", "Tabasco", "sour cream", "Melba"]