To make the burger patties. divide the ground beef into 4 equal portions and gently form into patties.
1 pound lean ground beef
Season both sides with salt, pepper, Italian seasoning, and garlic powder.
1 teaspoon kosher salt, ½ teaspoon black pepper, 1 teaspoon Italian seasoning, ½ teaspoon garlic powder
Preheat grill to medium-high heat.
Grill burgers for about 4–5 minutes per side, or until cooked to your preferred doneness.
While the burgers are cooking, combine the Roma tomatoes, red onion, garlic, basil, olive oil, balsamic vinegar, and salt. Toss to combine.
3 Roma tomatoes, 2 tablespoons finely diced red onion or shallot, 2 cloves garlic, ¼ cup chopped basil, 1 tablespoon balsamic vinegar, 1 tablespoon olive oil, ½ teaspoon kosher salt
During the last minute of cooking, add the sliced mozzarella and let it melt.
8 ounces fresh mozzarella
Assemble: Place the burger patty on the bottom bun. Top with bruschetta mixture, additional fresh basil, and a drizzle of balsamic if desired.
4 hamburger buns
Notes
Garlic powder: You can substitute minced garlic for the garlic powder.
Ground beef: I like to use beef that's about 80/20 or 85/15 for grilling burgers because the fat helps to keep the burgers juicy as they cook.
Buns: You can use hamburger buns or use small square ciabatta rolls for the buns.
Balsamic glaze: If you don't have any balsamic glaze, you can drizzle balsamic vinegar over the top.
Nutrition values are estimates and do not include the bun.