Gincart's Spaghetti Sauce

Adapted to my taste over many years of tweaking.

1/2 medium onion, fine dice
3 large cloves garlic, fine mince
2 tablespoons olive oil
1 (28 ounce) can whole Roma tomatoes (I prefer Progresso)
1 (8 ounce) can tomato sauce
1 tablespoon dried oregano, crumbled fine
1 tablespoon dried basil, crumbled fine
1/4 cup balsamic vinegar (the cheap stuff like at Sam's)
2 teaspoons kosher salt
1/2 teaspoon granulated sugar
1/4 teaspoon black pepper, freshly ground

Using a good saut