How to make Pasta Tomato Sauce from scratch?

Tomato Sauce 500 grams tomatoes 1 medium onion 1/2 head garlic bay leaf salt and pepper 2 tablespoons olive oil 2 cups vegetable stock or water Peel and de-seed tomatoes, chop. Crush the garlic until very fine. The onion should also be finely chopped. In a pot or deep pan, heat oil and then fry the onion till soft and transparent, approximately 3-5 minutes. Add the garlic and cook for another 5 minutes. Combine the chopped tomatoes, salt, pepper and bay leaf then on very low fire, simmer for around 10 minutes. Stir the mixture now and then to prevent it from sticking. Pour in the vegetable stock or water. Simmer for another 10 minutes. Remove the cooking vessel from heat and set aside till cool. Puree in a food processor or run through a sieve. Return to heat and reduce till it reaches desired thickness.