Begin by cutting the Onion & Bell Peppers into slices (thicker is better as they will shrink when sautéing).
Before you begin to sauté the veggies, turn on your Traeger Timberline 1300 and set it to 350° F, allowing it to come to temp while you prep the Oberon Beer Bath.
Next place your olive oil in the cast iron pan along with your cut onion and bell pepper. Season with Rock's Anytime Seasoning, and sauté for about 7-10 minutes until the onions start to become translucent. DO NOT over sauté or your veggies as they will finish cooking in the beer bath.
After you have sautéd the veggies, pour the beer and water into your large cast iron pan.
NOTE: Depending on the size of your pan and how many brats and veggies you have, feel free to adjust the beer and water amounts, keeping it roughly equal parts.
Lastly, place your Bratwursts into your cast iron and place on the smoker. Allow the Bratwursts to cook in the beer bath for 30-45 minutes.
NOTE: Again, depending on the size of your pan, if the brats are not fully submerged you may choose to flip them in the beer bath about half way through.