Preheat the oven at 150 C
Cut the tomatoes in small pieces, place them on a baking tray, splash with olive oil and season with salt.
Roast in the oven for about 2 hours.
Boil the vegetable stock and keep it warm in a pan on a low heat.
Chop the shallot and crush the unpeeled garlic clove.
Heat 30 grams of butter and the olive oil in a pan, then add the garlic and the chopped shallot. Fry on a low heat for a few minutes, until they get soft. Remove the garlic clove.
Add the rice, and keep cooking and stiring for 2-3 minutes, until the rice becomes opaque.
Add a pinch of salt, and then gradually add the stock, stirring with a spoon until all the liquid is incorporated. After aproximately 15 minutes, add the roasted tomatoes.
Finish cooking, take the pan off the hob, add the butter and the parmesan and stir together until you get a creamy consistency. Cover the pan and leave the risotto to rest for 2-3 minutes before serving.
Add some fresh ground black pepper and serve hot.