Mustard seed is, obviously, the basis of your own homemade gourmet mustard. It also an invaluable addition to many sauces, stews, chutneys, breads and casseroles. Mustard is usually made with crushed or ground mustard seeds, vinegar, and wine. Honey or sugar are often added for sweetness, herbs and spices to taste. Tarragon is a frequent addition to mustard recipes, as is turmeric, which gives a bright yellow color.