To make a basic piquant sauce, sauté some crushed garlic in a little butter and olive oil. Add half a cup of tomato sauce (Marinara sauce or Napolitana sauce) and warm it thr…ough. Add a tablespoon of Dijon mustard, a tablespoon of brown sugar, a teaspoon of wholegrain mustard, a tablespoon of Worcestershire sauce, a tablespoon of brown sugar, a splash of red wine vinegar or cider vinegar, a teaspoon of chopped capers and a teaspoon of grated lemon peel. Add salt and cracked black pepper to taste. This will give you a good, basic piquant sauce. Remember, 'piquant' just means "having a sharp or appetizing flavor". So, if you want to change it, it should always have a sharp, sweet-and-sour kind of flavor. You can add chopped pickles, or chopped giardiniera, or any other sharp, sour condiment. (MORE)