Curry Pumpkin Soup

Name: Curry Pumpkin Soup
Ingredients: 1 tablespoon unsalted butter; 1 1/2 cups roughly chopped yellow onion; 2 cloves (about 2 teaspoons) garlic, minced; 2 teaspoons fresh ginger, minced; 1 1/2 teaspoons curry powder; 3/4 teaspoon ground cumin; 1/2 teaspoon ground coriander; Small pinch cinnamon; 1 teaspoon kosher salt, plus more to taste; 4 cups low sodium chicken stock or vegetable stock; 2 bay leaves; 2 (15-ounce) cans 100% pumpkin or 3 1/2 cups homemade pumpkin purée (see recipe notes); 1 cup water; 3 tablespoons heavy cream; 1/8 teaspoon black pepper; Yogurt, for garnish; Toasted pumpkin seeds, for garnish