2 teaspoons butter
1 onion, chopped
1 pound butternut squash, peeled and chopped
2 apples, peeled and chopped
1 small potato, peeled and chopped
1 teaspoon grated fresh ginger root
1 pinch white pepper
4 cups water
1/4 cup apple cider
1 teaspoon packed brown sugar
1/2 cup plain yogurt
1 tablespoon finely chopped toasted pecans