Clean the onions, finely chop them and braise them for 40 min. with Pomì organic chopped tomatoes, oil, salt and sugar, until a thick and tasty mixture is obtained.
Shape the burgers by adding to the ground beef salt and pepper to taste.
Cook the burgers on the grill and after cooking, brush Pomì Ketchup on the meat and place the burger patty on a slice of crusty bread.
Serve with the braised onions separately.