Cook the pasta with a tablespoon of oil in plenty of boiling salted water for ten to twelve minutes. Cut tomatoes crosswise, blanch briefly in boiling water, peel, quarter, seed and cut the flesh into slices.
Wash spinach thoroughly, sort and possibly pluck a little. Drain the noodles, rinse under cold water, drain and allow to cool. Peel onion and garlic and chop finely. Mix vinegar with salt and pepper.
Add onion and garlic and beat the remaining oil into it. Dice the cheese. Mix everything loosely and arrange in a bowl.