Heat the butter in a sauce pan until melted and slightly golden browned (smelling of nuts) and then add the high quality soy sauce.
Let the liquid reduce slightly on high heat for half a minute and then add the cream. Cook for 2 minutes and then take off the heat until ready to use.
Cabbage
Cut the cabbage lengthwise in quarters.
Put some olive oil as well as pepper & salt on the cutting sides of each quarter.
Wrap each piece in foil.
Put the cabbage on the rack in your kamado and warm it for 5 minutes on all 3 sides, so for 15 minutes in total, to have it heat gradually.
Take the cabbage pieces out of the foil and roast them on both of their cutting sides for a few more minutes until nicely marked, but not burnt.
Hazelnuts
Roast a handful of hazelnuts in a dry pan.
Crunch the hazelnuts
Sauce again
Reheat the sauce if necessary and use a hand mixer or blender to foam the sauce.
Serve
Serve each piece of cabbage grilled side up with some foamed sauce and the crushed hazelnuts on top.