brat au jus
Since you have to get those brats from the grill to the table somehow anyway, you might as well make a little Brat Au Jus (aka your Basic Brat Broth) for the journey. Slice up an onion, add a can of beer, get that all nice and hot on the grill and then dump in your brats. That's all there is to it!
Brat Au Jus is very versatile and a staple of classic Brat Fry cuisine. You can make it in advance and let your brats sit in there, just like they're taking a cold bath for an hour or so before you put them on the grill. (No, don't even think of boiling them!) And don't throw it away after you start grilling. Once your brats are about 3/4 done (approx. 10 min.), place the pot on the grill (you're using a metal pot, right?) and get the Au Jus simmering. Then toss in your brats and finish them off by having them simmer away until they're done (remember, we always say brats are "done" - we never say they're "cooked").