Ingredients

• 18 oz (about 2 1/2 cups) ground beef
• 2 teaspoons tomato ketchup
• 1 tablespoon teriyaki sauce
• 4 scallions, finely chopped
• 1 egg, lightly beaten
• 4 oz Cheddar cheese, cut into 8 small pieces
• flour for dusting
• vegetable oil for brushing
• 8 small part-baked bread rolls
• tomato salsa for serving
• 8 romaine lettuce leaves

Instructions

1. Mix together the beef, sauces, scallions, and egg in a large bowl. With damp hands, divide the mixture into 8 balls, then shape into flat patties.
2. Insert a piece of cheese in the center of each patty. Wrap the meat around the cheese and shape into a burger. Place on a lightly floured plate and chill for 30 minutes.
3. Brush the burgers with oil and cook on a cast-iron grill-pan or under a hot broiler for 5-8 minutes on each side.
4. Meanwhile, bake the rolls according to the manufacturer's instructions. Split them in half and top the bottoms with the cooked burgers, tomato salsa, and a lettuce leaf.
5. If you are cooking on a barbecue, place the burgers on a lightly oiled barbecue grill over medium heat, so they do not burn on the outside before being cooked through. Cook for 5-8 minutes on each side.