In a soup pot or large pot melt the butter or medium heat and saute the garlic and the onions until translucent. Add the pumpkin, potatoes and stock.
Bring up to a simmer, add the red pepper flakes, nutmeg, salt, pepper and ginger powder and stir well. Let simmer for 15-20 min. or until the potatoes and pumpkin are very soft. Puree with a hand blender or blender until smooth. There may be still some skins that don't blend and that adds a nice texture. Add the cream and return to heat. Serve hot and garnish with pepitas and fresh ground black pepper.
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.