Winter Vegetable Chowder

Name: Winter Vegetable Chowder
Ingredients: 6 pieces White fish; 3 cups Small prawns; 1 Swede (Rutabaga), 1/2 dice; 1/2 Celery Root (Celeriac), 1/2 dice; 3 Potatoes, 1/2 dice; 5 Carrots, medium, 1/2 dice; 1 White or yellow onion, large, diced; 3-4 sprigs Thyme; 3 Garlic cloves; 1 1/4 cups Heavy cream (300ml); 6 cups Chicken stock or water (1.5L); 1 Bay leaf; 2 tablespoons Olive oil or butter