Tomato Sauce

1 tin diced tomatoes (28 fl. oz/796 ml)
1 tin crushed tomatoes (14 fl. oz/398 ml)
1 tbsp. double concentrate tomato paste
1 onion
garlic (2-3 very large cloves)
1 oxo
1/2 pint red wine
italian seasoning (basil, oregano, rosemary, thyme)