Sweet Potato and Kimchi Pancakes

Name: Sweet Potato and Kimchi Pancakes
Ingredients: 1 pound sweet potatoes; 1 cup packed kimchi (7 ounces), very thinly sliced; 1 1/2 teaspoons finely chopped garlic; 1 to 2 tablespoons chopped fresh serrano chiles (including seeds; amount depends on heat of kimchi); 1 cup thinly sliced scallions (from about 2 bunches); 1 large egg, lightly beaten; 1 teaspoon kosher salt; 3/4 cup all-purpose flour; About 1/2 cup corn oil or lard; Accompaniment: soy-vinegar dipping sauce; Equipment: an adjustable-blade slicer