Remove the outer cabbage leaves. Cut cabbage into slices, wash and drain well. Clean and clean the mushrooms and possibly halve them. Grate cheddar roughly. Mix cream cheese, cheddar and stock, season with salt and pepper.
Heat the oil in a pan and fry the mushrooms.
Spread the pointed cabbage in an ovenproof casserole dish, add the bacon and mushrooms and pour over the cheese mixture. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 10-15 minutes.
Wash the chives, shake dry and cut into small rolls. Remove the casserole from the oven, sprinkle with chives and serve.