2 lbs ground chuck |
1/2 cup prepared horseradish |
1/4 cup minced yellow onion |
salt & freshly ground black pepper |
16 slices havarti cheese or 8 ounces cheese, sliced into 8 slices |
8 large hamburger buns, split |
catsup, on the side for serving |
mayonnaise, on the side for serving |
mustard, on the side for serving |
bacon, on the side for serving |
lettuce, on the side for serving |
tomato, on the side for serving |
sliced onion, on the side for serving |