Scratch tomatoes crosswise. Place in a bowl and boil over with boiling water. Then rinse with cold water and remove the skin. Cut the tomatoes into small pieces. Peel onion and dice very finely.
Heat 1 tablespoon of oil in a saucepan. Sauté the onion in it. Add tomatoes and simmer covered for about 10 minutes. Season with salt, chilli and sugar.
Meanwhile wash the pimientos and pat them dry well. Heat 2 tablespoons of oil in a frying pan. Fry the Pimientos for 5-6 minutes, turning them until the skin becomes wrinkled but not too brown. Sprinkle with sea salt.
Wash the basil, shake dry and pluck the leaves. Season the tomato sauce with salt, chilli and sugar and divide it between four plates. Place 1 burrata on each plate. Drizzle with a little oil and sprinkle with coarse pepper.
Place the pimientos on top and garnish with basil. Baguette tastes good with it.