Sweet Potato and Chive Pancakes

1 pound sweet potatoes, cooked, peeled, and mashed
1/3 cup flour
I teaspoon cornstarch
1 whole egg
2 egg yolks
1/2 cup milk
1/4 teaspoon each salt and freshly ground black pepper
1/2 cup chopped fresh chives
4 tablespoons butter or oil for frying
1 cup plain yogurt or sour cream
1 teaspoon ground cumin

In a food processor, combine the potato with the remaining ingredients, except the butter, yogurt, and cumin, until smooth. In a large skillet, heat the oil. Spoon the batter into the pan to form 2-inch pancakes. Fry for about 45 seconds per side, or until golden-brown. Serve immediately. Combine the yogurt with the cumin and serve over the pancakes.

makes 12 pancakes.