Dip cabbage leaves in boiling water until pliable. Dry fry grated onion in a non-stick pan. Mix minced chicken, onion, herbs, carrot and spinach in a bowl. Divide evenly and place on cabbage leaves. Roll up and secure with toothpick. Place in ovenproof dish and cover with chicken stock (use Campbell’s Real Stock or homemade). Place in a moderate oven and bake for 30-40 minutes. Serve with fresh vegetables and a large green salad.