Ingredients
Method
- Toast the mustard seeds in a dry nonreactive saucepan over medium heat until lightly browned, 2 to 3 minutes. Transfer the mustard seeds to a small heatproof bowl to cool.
- Add the butter, bacon, and onion to the pan and cook over medium heat until the onion is lightly browned. Stir in the mustard, vinegar, brown sugar and half of the toasted mustard seeds and gradually bring to a boil. Reduce the heat and gently simmer the sauce until thick and richly flavored, 5 minutes. Add salt and pepper to taste.
- Transfer the sauce to clean jars and store in the refrigerator. Store the remaining toasted mustard seeds in an airtight container and sprinkle them over the sauce just before serving. The sauce will keep for at least one week.
