Boil the tomatoes and place in an ice water bath. Remove the skin and the seeds. Marinate 15 minutes with salt, sugar and pepper. Pat dry and drizzle with olive oil. Place a sheet of baking paper over a baking tray. Top with spices and crushed garlic. Arrange the quarters of tomatoes and bake in the oven as follow: 30 minutes at 100°C then 1h30 to 2 hours at 90°C The baking process could be extended to 1 to 2h at 70°C if required.