Ingredients
Ingredients for the topping:
4 - 5 ripe tomatoes preferably from the market or large bunch of cherry tomatoes
olive oil
fleur du sel (or ground sea salt)
1 soup spoon of dried oregano
Preheat the oven to 160°. Coarsely chop the tomatoes and put them in an ovenproof dish. Drizzle olive oil over the tomatoes and add the salt and oregano. Slowly roast the tomatoes in the oven until completely wilted.
Ingredients for the burgers:
4 soup spoons of olive oil
1 small to medium red onion cut in half and then in thin half rounds