Sweet Potato Latkes

Name: Sweet Potato Latkes
Ingredients: 1 pound sweet potatoes or yams (about 2 medium), peeled; 2 tablespoons minced fresh ginger; 2 eggs; 1/2 cup milk; 1/2 cup all-purpose flour; 1 tablespoon sugar; 1 teaspoon baking powder; 1 teaspoon salt, or to taste; Vegetable oil for frying; Sour cream or applesauce, for serving (optional)