After trying a few bratwurst recipes, I've found this meal-in-one is ideal for camping since it grills to perfection in a heavy-duty foil bag. Loaded with chunks of bratwurst, red potatoes, mushrooms and carrots, it's easy to season with onion soup mix and a little soy sauce. —Janice Meyer, Medford, Wisconsin
For each of 2 foil packets, arrange a double thickness of heavy-duty foil (about 17x15 in.) on a flat surface.
Cut brats into thirds. Divide the brats, potatoes, carrots, onion and mushrooms evenly between the 2 double-layer foil rectangles. Dot with butter. Sprinkle with soup mix, soy sauce and pepper. Bring edges of foil together; crimp to seal, forming 2 large packets. Seal tightly; turn to coat.
Grill, covered, over medium heat for 23-28 minutes on each side or until vegetables are tender and sausage is no longer pink. Open foil carefully to allow steam to escape.