question: What is a good beer pairing for Smoked bratwurst and mustard?
answer: A great choice for Smoked bratwurst and mustard is U-Boat (w/ Victory Brewing) (Smoked Porter Collab With Victory Brewing.). Here's the recipe:
  A Smoked Porter Collab With Victory Brewing. with 8.4% ABV. Uses 6 malts and 3 hop varieties. Brewing tip: A good Porter is dependant on a long fermentation and cellaring process. Keep the temperature controlled as much as possible.