The edible leaves of the mustard plant are a source of vitamin C, vitamin A, iron, and potassium. Prepared mustard is made from the seeds of the plant, which are macerated in wine, must, and vinegar or water and ground to a paste. It is used to flavor rabbit, pork, chicken, and fish and is a basic ingredient in salad dressings, mayonnaise, and remoulade. Whole mustard seeds are used in marinades, sauces, and curries. Mustards are small and round in shape with a sweet nutty taste, they can be either black or yellow. They are used in a wide variety of dishes and are usually the starting point for many recipes and are fried in hot oil until they 'crackle'.