Preheat the grill. Alternatively, the burgers can be prepared in a pan.
Roast pine nuts without oil in a pan. Leave to cool. Then mix all ingredients necessary for the burgers in a bowl. Season with salt and pepper. Form round burger patties and chill on a plate in the fridge for 20 minutes.
So the burgers do not fall apart so easily during frying/grilling.
Take the burgers out of the fridge and brown them in a pan or on a hot grill for 3 to 5 minutes on each side. The inside temperature should be around 160°C.
Place a slice of cheddar cheese on 4 of each bun. Then spread the Burger Patties on top. Season with salt and pepper if necessary. Cut the onion into rings and the tomatoes into thin slices.
Garnish the respective burgers with onion rings, tomato slices, 1-2 more slices of cheddar cheese and finally with 1-2 leaves of iceberg lettuce.
Tip: The buns must be toasted or briefly grilled beforehand so that they retain their shape and do not become mushy. A salad or of course the classic French frieze is a great accompaniment to the burger.