In a bowl, combine diced tomatoes, minced garlic, chopped basil, olive oil, and balsamic vinegar. Mix gently and set aside.

In a mixing bowl, season ground beef with salt and pepper. Form into four patties about one inch thick.

Heat the grill over medium-high heat while letting patties rest at room temperature.

Cook patties on the grill for about four minutes per side for medium-rare doneness.

During the last minute of grilling, place buns cut-side down on the grill until lightly toasted.

Place each patty on a toasted bun and top generously with tomato-basil mixture.