This soup is a light and delicious starter to any fall or winter meal. It comes together so simply, making it a great meal for entertaining or for serving on busy weeknights.
Heat olive oil over medium heat in a large Dutch oven. Add onions and scallions to hot oil and sauté until golden brown. Stir in pumpkin, broth, bay leaf, sugar, curry powder. nutmeg, and parsley.
Bring to a simmer and continue simmering, uncovered, for 15 minutes, stirring occasionally.
Remove bay leaf and transfer soup to a food processor in batches (or use a handheld blender) and puree until desired consistency.
Return to pan and add salt and pepper to taste.
Serve and garnish with pumpkin seeds, parsley, and a dollop of sour cream or yogurt.