Cut the Hokkaido into bite-sized pieces. Cut the peppers into small cubes.
Cut the leek into rings and grate or finely dice the ginger.
Heat the fat in a saucepan and fry the pumpkin while stirring. Add the leek and ginger. Reduce temperature significantly. Deglaze with the coconut milk and continue to stir vigorously. Stir in the pepper cubes.
Add all the spices and cook with the lid closed to the desired firmness.