A little advice: if you find them at your greengrocer's, let them rest for a few more days on the countertop. Their taste will be all the more intense.
Deux ans de tomates savoureuses sans une goutte de vinaigre : le secret d’une conservation longue durée
What you need for three 2-litre jars
7 kg fresh tomatoes (if possible fleshy)
A few sprigs of fresh basil, for the fragrance
Boiling water (for sterilizing the containers)
Preparation: 15 minutes
Cooking: 30 minutes
Storage: up to 2 years
Simple steps to successful canning
Preparing the tomatoes
Wash your tomatoes thoroughly, then cut them into slices. Then blend them in a blender until you get a smooth puree.