Preheat the oven to 160 degrees Celsius top and bottom heat
Grease a large baking dish with 0.5 tablespoon rapeseed oil
Wash 400 grams green cabbage and cut it into large slices about 7 cm long and 3 cm wide
Arrange the cabbage pieces as a bed on the bottom of the baking dish
Peel 150 grams carrots and 200 grams potatoes and cut them into pieces of about 3 cm
Wash 20 grams fresh chives and cut them into pieces of about 3 cm
Peel 1 clove fresh garlic and crush them
Add 1.5 tablespoons dijon mustard, 1 tablespoon rapeseed oil, the crushed garlic and 1 tablespoon dried rosemary to a small bowl and stir until the sauce is well combined
Add 4 chicken thighs, the potatoes, carrots and chives into a large bowl, pour the mustard sauce over the mixture and mix well until the vegetables are coated with the sauce
Arrange the chicken and vegetables on the green cabbage in a way that the chicken pieces are skin-side up
Bake the casserole in the oven at 160 degrees Celsius top and bottom heat for about 30 minutes until the chicken skin is browned