Ingredients
Method
1.Combine ingredients in a large saucepan and bring to the boil. Reduce the heat to a simmer and cook for 1 hour.
2.Remove the bay leaves and thyme, and blend the sauce with a stick blender or whizz in food processor until a smooth.
3.Pass the sauce through a colander or sieve, if you prefer no seeds, and return to the saucepan.
4.Season to taste and bring back to the boil before ladling into clean, hot jars.
5.Seal while hot, or store the ready-to-eat sauce in jars in the fridge.