Heat up a grill pan or grill plate and grill the beef burgers for 2-3 minutes per side.
Cut beautiful rings from the white onion. Cut the cucumbers with a carving knife.
Grill the onion rings until they have beautiful grill marks and are lightly caramelized.
Cut the brioche buns open and roast briefly on the grill for extra flavor.
Place a ring of white onion on each slice of bread first, then 1 burger with Hela Gouda Cheese.
Repeat the steps and finally divide the cucumber slices.
Place the lid on the brioche bun.