How to Make It
Preheat oven to 375°F. Cut the yams crosswise into ¼-inch slices, leaving about ⅛ inch intact at the bottom. Place the yams on an aluminum foil–lined baking dish; cover tightly with foil. Bake until slightly tender, about 25 minutes.
Meanwhile, melt the butter with the sage in a large skillet over medium and cook, stirring often, until golden, 5 minutes.
Remove foil. Brush the butter mixture on the yams so it seeps in between the slices. Return to oven and bake, uncovered, until tender, 55 minutes to 1 hour. Sprinkle the yams with the salt, paprika, and pepper.