Roughly chop all of the veg other than the garlic (cut the carrots smaller than the other veg as they are harder)
Peel the garlic and smash lightly with the back of a knife and add it to the rest of the chopped veg
Drizzle with the olive oil
Sprinkle with salt and pepper and the mixed herbs
Mix well in a large roasting tray
Cook in the oven at 200°c for 20 minutes
Mix well
Cook in the oven at 200°c for a further 20 minutes
Whilst the veg is roasting, add all of the tins of tomatoes to a large saucepan or casserole dish
Fill two of the tins of tomatoes with water and empty them into the pan
Add the red wine vinegar
Add the sugar and the whole sprigs of thyme
Add the red pesto and sun-dried tomatoes if using them
Bring the pan to the boil and leave to simmer until the roasted veg is done
Add the cooked veg to the pan and simmer (uncovered) for a further 20 minutes
Remove the sprigs of thyme from the sauce
Blitz with a stick blender until smooth
Add salt and pepper to taste
Add water to your desired consistency
Add portions to freezer bags, label with the date and name of sauce and lie each one flat in the freezer. You can also keep some out for your dinner that night!