Quick Tomato Sauce

2 Tablespoons olive oil
1 small onion, peeled, finely chopped
1 garlic clove, crushed
2 teaspoons tomato paste
410g can crushed tomatoes
1 teaspoon sugar
1 tsp dried mixed herbs

Heat the oil in a saucepan. Add the onion and garlic and cook over low heat until the onion is softened. Add the tomato paste, crushed tomatoes, herbs and 1/2 cup water. Simmer for 25 minutes until thick. Season with salt and pepper.