Roasted Parsnip and Carrot Soup with Spiced Crème Fraiche

Ingredients

• 2 pounds carrots
• 2 pounds parsnips
• 2 tablespoon extra virgin olive oil
• 1 tablespoon unsalted butter
• 1 large yellow onion, chopped
• 6 cups chicken stock
• Salt and freshly ground black pepper
• 1 cup crème fraiche
• 1/2 teaspoon ground coriander
• 1/4 teaspoon ground cumin
• 1/4 teaspoon ground ginger
• Large pinch curry powder
• Small pinch allspice
• Small pinch nutmeg