1. At least 1 hour or up to 1 week before serving:
2. Preheat oven to 350°.
3. Line a 15 1/2 x 10 1/2 x 1-inch jelly roll pan with foil. In a small bowl, mix brown sugar and mustard. Spread half of the mixture evenly in pan. Place bacon slices in a single layer over brown sugar mixture in pan. Sprinkle with remaining sugar mixture. Bake for 25 to 30 minutes or until bacon is medium brown and crisp.
4. As bacon is done, transfer with tongs or a fork to a sheet of waxed paper. Cool. Break each slice into five pieces. Store in an airtight container in refrigerator up to 1 week. To serve, place pieces in a glass or wooden dish.