Immerse the grill board (made of linden or alder) for 1-12 hours in water so that it is completely under water.
Lightly fry the chopped onion in a frying pan. Add the minced meat, salt and pepper to taste, and fry for 10 minutes. If desired, you can add finely chopped herbs, garlic or chili to the minced meat.
Preheat the barbecue / grill to medium heat (160-180 ° C, the hand at the grill endures heat for about 10 seconds).