To make with fresh brats, heat some oil in a medium skillet over medium-high heat until shimmering. Brown the brats on each side, 2 to 3 minutes. Reduce the heat to low, add 1/2 cup beer or water and simmer until they reach an internal temperature of 160 degrees F, 6 to 8 minutes. Remove to a paper towel-lined plate to dry, then proceed with the recipe.