1 large kabocha squash, cut in 1/2, seeds removed
1 tablespoon picked thyme leaves
Salt and freshly ground black pepper
6 tablespoons olive oil
1 cup heavy cream
1 stalk lemon grass, thick end only, finely chopped
1 small carrot, roughly chopped
1 small Spanish onion, roughly chopped
1 small leek, white portion only, roughly chopped
6 cups chicken stock, heated
Chives, cut in 1-inch sections, for garnish