Blend cottage cheese and yogurt in a food processor fitted with a metal blade until smooth and without lumps (a blender makes it too thin). Serve immediately, or store in the refrigerator up to 4 days, and use as needed. Use as topping for Creamy Baked Fish, as a replacement for mayonnaise in tuna salads, tossed with vegetables, spooned onto baked potatoes, and spiced up with garlic and onion powders, chives or parsley.