Cut tomatoes in half and remove both the stem and the green part inside

Squeeze them in order to reduce water and remove the seeds.

Put them in a pot an cook them until they become a pulp.

Mince them with an immersion mixer (or a masher if you have it) and add salt, pepper and fresh basil.

ADVICES AND NOTES: If the tomatoes aren't very tasty, you can always make a soffritto with onion first (I did). You should make a lot of it and freeze it. I strongly advice fresh basil, this time ut's not the same.