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1
Put the beef in a large mixing bowl.
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2
Use a rubber spatula to fold in the horseradish and chives; season with salt and pepper.
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3
Hand-form the meat into 8 burgers, cover them, and chill in the fridge while preparing your grill.
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4
Place a large grill pan on 2 burners over medium-high heat or preheat a gas or charcoal grill and get it very hot.
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5
Burgers stick to a cold grill, so it's important that you give it plenty of time to heat.
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6
Take a few paper towels and fold them several times to make a thick square.
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7
Blot a small amount of oil on the paper towel then carefully and quickly wipe the hot grates of the grill; this will create a non-stick grilling surface.
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8
Grill the burgers for 8 minutes per side for medium; 7 minutes if you like your meat rare.
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9
When the burgers are just about cooked, put a couple of slices of cheese on top of each and cover the grill for 1 minute to melt the cheese.
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10
Remove the burgers to a clean side plate so you have enough room to toast the buns.
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11
Rub the grill rack with the same paper towel as before to clean the small charred pieces, then toast the hamburger buns cut-side down for 1 minute.
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12
Serve the burgers with your favorite condiment and any garnish you like, such as bacon, lettuce, sliced tomato, and onion.
