>>21432141That's retarded advice because the opposite is true. Also peeling, deseeding etc are pointless busy work. Just blanch, shock and blitz smooth in the blender. If you want to peel it first for textural reasons, that's fine, but not necessary. Heat olive oil with smashed-flat-but-otherwise-whole cloves of peeled garlic. When fragrant, add the blitzed tomato. Cook over high heat, stirring often (if not constantly), until reduced and thick. Salt to taste and add fresh sweet basil or sweet parsley.
If you want to go margherita style, even cooking the tomato at all is unnecessary. Just get decent plum tomatoes, blanch, shock and peel them then crush by hand and sieve of excess juice. Place these crushed, sieved tomato bits onto your dough, add mozzarella, salt and olive oil and bake it. Add basil when it's done.