Core the apples, peel them, and cut them into ¼-inch-thick slices. Rub them with the lemon to prevent discoloration.
Melt 1 tablespoon of the butter in a skillet, and sauté the apples over medium-low heat, 5 to 7 minutes. Sprinkle them with the sugar, raise the heat, and cook over high heat until lightly browned on all sides, shaking the pan constantly to preve