Tennessee Onion Burgers

Bahan-bahan (8 porsi)

• Tennessee Onions (Use the recipe from RecipeGirl.com)
• 2½ pounds 80/20 ground beef ((cold))
• 1½ tablespoons minced garlic
• 1½ tablespoons Worcestershire sauce
• 1½ teaspoons freshly ground black pepper
• 1½ teaspoons salt
• 8 slices cheddar cheese
• 8 hamburger buns
• 3 tablespoons butter, (at room temperature)
• desired condiments: ketchup, mustard, pickles, sliced tomato and lettuce