Classic heirloom tomato sauce

Name: Classic heirloom tomato sauce
Ingredients: 3 pounds very ripe red or yellow meaty heirloom tomatoes – peeled and seeded (seeds strained and juices reserved, about 3/4 cup); 1/2 cup extra virgin olive oil (see cook’s note 2); 6 large garlic cloves – skinned and finely sliced; 1 small bunch basil (3 oz) (85 g) – leaves removed from stems and torn in 1” pieces; 3/4 to 1 teaspoons sea salt to taste; freshly ground black pepper to taste; 1 teaspoon aged balsamic vinegar (preferably 20 to 25 years old)