1Pierce each bratwurst with fork 3 or 4 times. In 2-quart saucepan, heat beer and bratwurst to boiling; reduce heat. Cover; simmer about 10 minutes or until bratwurst are thoroughly heated; drain.
2Mix relish and bell pepper. Spread mustard on buns. Place bratwursts in buns. Spoon 2 tablespoons relish over top of each bratwurst.