Savory Cheese Tarts
["1 c. flour", "1/2 tsp. salt", "1/4 c. shortening", "3 oz. cream cheese, softened", "3 Tbsp. water", "1/4 c. chopped onions", "1 Tbsp. margarine", "3/4 c. sour cream", "2 egg yolks", "1/4 tsp. salt", "1/8 tsp. pepper", "2 Tbsp. grated Parmesan cheese", "1/2 c. shredded Cheddar cheese", "1/2 c. shredded Swiss cheese"]
["Heat oven to 450\u00b0.", "Combine flour and 1/2 teaspoon salt in a mixing bowl; cut in shortening and cream cheese thoroughly with a pastry blender.", "Sprinkle with water, 1 tablespoon at a time, mixing with a fork until flour is moistened."]
["flour", "salt", "shortening", "cream cheese", "water", "onions", "margarine", "sour cream", "egg yolks", "salt", "pepper", "Parmesan cheese", "Cheddar cheese", "Swiss cheese"]