Smoky Butternet Squash and Apple Soup

Name: Smoky Butternet Squash and Apple Soup
Ingredients: 1 medium butternut squash, peeled, seeded and cut into large dice; 2 medium red apples (look for sweet/tart and crisp), peeled, cored and cut into large dice; 1 teaspoon lemon juice; 1 small onion, diced; 1 medium clove garlic, minced; 1½ teaspoons coarse salt; 1½ teaspoons ground cumin; ½ teaspoon ground coriander; ½ teaspoon smoky Spanish paprika; 2 cups chicken or vegetable stock; 1½ cups water; Salt and pepper, to taste; 1 sprig cilantro, optional for garnish; 4 tablespoons light sour cream, optional for garnish