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| balsamic vinegar: 1 Tbl |
| olive oil: 1 Tbl (extra virgin) |
| salt: 1/4 tsp |
| black pepper: 1/4 tsp |
| ground beef: 1.33 lbs |
| canned tomato paste: 1 Tbl |
| fresh basil (chopped): 1/4 cup |
| grated parmesan cheese: 50 g |
| garlic: 1 clove (minced) |
| black pepper: 1/4 tsp |
| mozzarella cheese, nonfat: 4 oz |
| hamburger buns: 4 buns |
Credit: allrecipes.com