Combine pumpkin, potatoes, carrots and onion in a medium - large sized pot/saucepan
with just enough water to cover the vegetables and salt to season. Bring to the boil, reduce heat, and simmer until all vegetables are soft. Add stock powder, stirring, and taste. (Add more salt or stock powder to suit your tastes). Add the spinach leaves, and push them down gently into the hot water until wilted.