Add the brats to an aluminum foil pan. Top with sliced onions and peppers.
Sprinkle seasonings over vegetables and pour beer into the pan.
Place the pan in the smoker and cook for 2 hours, tossing occasionally to coat the onions, peppers, and brats with beer.
During the final 30 minutes of smoking time, remove brats from the pan and transfer them to the grate above the pan. The color of the brats will change to a smokey pink/red, indicating they are completely cooked.
Serve on toasted buns with your favorite brat toppings.
Notes
You can use any beer you like. I recommend a light ale, such as Blue Moon or Allagash White.