1. Preheat the grill. 2. Mix all the ingredients together with a fork. Adjust the seasoning with salt and pepper. 3. Dip your hands in water and shape the meat into flatter rounds (patties) that are all equal in size. 4. Make a slight dip in the centre, as the patties will shrink and thicken during the grilling process. 5. Grill each patty on a steady heat, turning only once. 6. For a rare burger, grill for 3 minutes on each side. For a well done burger, grill for 5 minutes on each side.