On a brat? You need kraut and onions...and they MUST be part boiled in beer before grilling... With the onions and peppers in the beer... Yum
Agree on the boil in beer thing. The boil in onions (and maybe peppers) was called Sheboygan style by the people in west central WI when I was living there, and didn’t seem to be common around those parts. It’s good, though.
Edit: for me, the beer has to be Leinies...