Finely sliced red onions
Finely grated carrots
Finely chopped red and orange peppers
Finely slices leeks
Sweat all the vegetables in a pan with a few drops of olive oil. When the vegetables are soft add the chopped tomatoes and some vegetable stock.
Reduce the sauce till all blended together.
If you use a blender only blend 50% of the mixture, and keep some lumps.
add a few bay leaves for extra flavour – (remove them before serving)