Basic Tomato Sauce

Name: Basic Tomato Sauce
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Yield: Makes 1 litre
Ingredients: 60 ml balsamic vinegar; 100 ml olive oil; Salt and freshly ground black pepper; 2 kg ripe tomatoes, roughly chopped; 20 ml sugar