If I have tons, I wash and dry my ripe tomatoes and pop a freezer bag full of them. They get like rocks in the the freezer but when I want to do stewed tomatoes, I drop the frozen tomatoes into boiling water for a few seconds and then into a bowl of water in the ink. The skin peels right off and I chop them up and put them in a pot to cook. Add all my spices and onions and let them simmer away.