These are great to make ahead for cookouts or tailgating. Especially if you need the grill for other foods. They can be reheated in a foil pan on the grill, in the oven or in a crock pot. They can be made a day ahead, the morning of, or served right away. You need fresh bratwurst for this, not the smoked or white colored sausage. We've already made 100 of these ahead for large groups.