Preheat the combi steamer to 225°C with 25% humidity and 70% fan speed with a coated grill plate. Form 6 patties of 160g each from the minced mixture. Now place the patties on top and let them grill to a core temperature of 58°C, then place the cheddar on the patties and place the toasties on a baking plate and put them in the combi steamer. Now grill the patties to a core temperature of 72°C, then remove everything from the combi steamer, arrange and serve. Tomato slices, cucumber slices, onion rings, etc. can of course be used optionally.