sentence: cut the onions into  inch slices sentence: add olive oil on the iron pan and sear the bratwurst sentence: add the onions onto the pan covering the bratwurst sentence: pour some german beer over the onions sentence: remove the pan off the coal heat and close the grill lid and let it cook indirectly for about half an hour sentence: place the bratwurst on direct heat on the grill let it grill until cooked on both side sentence: grill  the sandwich roll along with the brats sentence: place the grilled bratwurst in the sandwich bread sentence: add onions in between the bread spread ketchup on the bratwurst and serve