Heat stock, salt, pumpkin, onion, thyme, garlic, and peppercorns. Bring to a boil, reduce heat to low, and simmer for 30 minutes uncovered.
Puree the soup in small batches (1 cup at a time) using a food processor or blender.
Return to pan, and bring to a boil again. Reduce heat to low, and simmer for another 30 minutes, uncovered. Stir in heavy cream. Pour into soup bowls and garnish with fresh parsley.
