1. Steam pumpkin for 25 minutes, strain and mash. Heat butter in a saucepan and add pumpkin purée and sauté for a few minutes until fragrant.
2. Add chicken stock, chicken bouillon solution, white pepper and chicken. Stir well and boil for 15 minutes. Check seasoning and add salt and pepper as desired. Add sugar.
3. Pour into bowls and garnish with cabbage and coriander. Serve immediately.