I make tomato sauce the easy way. Halved tomatoes cut side up on a baking tray, like yours, Jalima, with a coupld of chopped onions and a couple of chopped gralic cloves sprinkled over, then a drizzle of olive oil and an hour or so in the oven. The whole lot is scraped into a food processor (including black bits) when it has cooled a bit, and the tray rinsed (deglazed if you want to sound posh) with a splash of wine or water to get all the scraps. Whizz it to the required consistency, then freeze in convenient amounts. It makes a sauce for pasta, or is added to a casserole, or used to make tomato and beetroot soup in the winter. The soup is a lovely cherry red, and tastes rich and gorgeous with some feta crumbled over for garnish.