A delightful twist on the classic cheeseburger, featuring grilled onions and a blend of cheeses for a flavorful experience.
Combine the ground beef, thyme, and minced garlic in a mixing bowl. Mix gently until just combined.
Avoid overmixing the meat to keep the patties tender.
Shape the mixture into eight equal patties, about 1/2-inch thick each.
Use a light touch when shaping to prevent compacting the meat.
Brush both sides of the onion slices with olive oil.
Coating the onions in oil helps them caramelize evenly on the grill.
Preheat the grill to medium heat. Place the patties and onion slices on the grill.
Ensure the grill is clean and lightly oiled to prevent sticking.
Grill the patties for about 11-13 minutes, flipping occasionally, until they reach an internal temperature of 160°F.
Use a meat thermometer to check the doneness of the patties.
Grill the onions for 15-20 minutes, turning occasionally, until tender and caramelized.
Keep an eye on the onions to prevent burning; move them to a cooler part of the grill if needed.
Season the patties with salt and pepper to taste. Top each patty with a slice of mozzarella cheese and some crumbled feta cheese during the last minute of grilling.
Allow the cheese to melt slightly for a gooey texture.
Assemble the burgers by placing each patty on a bun, topping with grilled onions, and adding any desired condiments.
Toast the buns on the grill for added flavor and texture.