Heat a grill pan or skillet over medium high heat until quite hot,
Brush the bratwurst with olive oil and place in the pan. Brown for several minutes on each side until richly browned. Work in batches if necessary.
Meanwhile pour the cider into a slow cooker along with the bay leaves and peppercorns and turn on low.
Put the browned sausages into the slow cooker. Cover and cook for 2 hours. At this point you can turn the slow cooker down to the keep warm setting to keep the brats ready and waiting for hours.
To make the relish, toast the mustard seeds in a dry pan over medium heat until they start to pop. This will only take a few minutes. Remove from the heat and set aside.
Peel and mince the onion. You should have about 1 cup. Add it to a small bowl and toss with 4 tablespoons of vinegar.
Peel and mince the apple and add to the bowl, tossing well to coat all of the apple with the vinegar so it doesn't turn brown. Add the mustard seeds and salt and toss. Taste to adjust.
Cover and refrigerate the relish until ready to eat.
To serve, place a brat in a bun, slather with your favorite mustard, and load it up with the apple onion relish.
Notes
*If you don't have a slow cooker braise the brats at a very low simmer in a covered Dutch oven or stock pot.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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