Ingredients
1 pound ground pork
3/4 teaspoon fennel seeds
1 tablespoon olive oil
1 red bell pepper, cut into thin strips
1 yellow bell pepper, cut into thin strips
1 small yellow onion, thinly sliced
Coarse salt and ground pepper
2 teaspoons red-wine vinegar
4 slices fresh mozzarella
4 toasted buns
Preparation
Heat a grill to medium-high. Clean and lightly oil hot grill. In a bowl, mix pork with fennel seeds. Form into 4 patties. On a large piece of foil, combine oil, peppers, and onion. Season with salt and pepper. Fold foil around vegetables and crimp ends. Grill packet until vegetables are crisp-tender, about 8 minutes. Season patties with salt and pepper. Grill until cooked through, about 6 minutes per side.
In a medium bowl, toss vegetables with vinegar. Top each patty with vegetables and a slice of mozzarella. Cover grill and cook until cheese is bubbling, 1 to 2 minutes. Serve burgers on toasted buns.
