Hazırlanışı
1Whisk balsamic vinegar, oil, salt, and pepper in a small bowl. Pour over tomato slices to marinate.
2Preheat an outdoor grill for medium-high heat and lightly oil the grate.
3Mix ground beef, tomato paste, basil, Parmesan cheese, garlic, and 1/4 teaspoon pepper in a large bowl. Form beef mixture into 4 equal patties.