1 teaspoon dry mustard 6  tablespoons cream 2  tablespoons dairy sour cream 1  tablespoon minced onion 1/2 teaspoon Worcestershire sauce 1/4 teaspoon seasoned salt 1  small clove garlic, crushed in a garlic press 2  cups (8 ounces) shredded very sharp Cheddar cheese Crisp celery, cut in diagonal lengths, rinsed, dried, and chilled Measure dry mustard [...]