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1
Get a large grill safe dish (we use the reynolds disposable roasters), place the onions, red bell peppers (if using) and brats in the bottom.
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2
Mix the two mustards, Worcestershire sauce and brown sugar together and dump this mixture over the brats and onions etc.
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3
Stir until the onions and brats are evenly coated.
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4
Pour enough beer into the dish to cover the brats and onion, then give it a slight stir to mix the mustard mixture with the beer.
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5
Put in fridge and let sit at least 30 minutes, but an hour or two is much better. When marinating time is up, remove and let come to room temperature.
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6
Pre heat your grill to medium high heat.
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7
Place the container directly on the grate and cook the brats in the beer mixture for 10-15 minutes, until the beer is steamy and hot. Remove from heat. But do not discard yet.
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8
Turn the grill down to medium heat (or however you like your brats grilled).
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9
Remove the onions and brats from the beer mixture. Then place the brats on one side of the grill and the onions on the other.
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10
Grill brats and onions, turning occasionally until done. Each time you turn, baste with the remaining beer mixture. The onions should be somewhat caramelized and soft.
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11
Discard the remaining beer mixture and serve on buns or hoagies with sauerkraut and other condiments as desired.
