In a small bowl, combine the cream cheese, egg yolk and 1/4 cup sugar; mix well. Flatten bread slices with a rolling pin. Spread cream cheese mixture over each slice to within 1/2 in. of edges. Roll up diagonally from point to point.
In a shallow bowl, combine the cinnamon and remaining sugar.
Dip roll-ups in melted butter, then in cinnamon-sugar mixture. Place in an ungreased 15-in. x 10-in. x 1-in. baking pan. Bake at 350° for 16-19 minutes or until lightly browned. Remove to wire racks to cool. Yield: 8-10 servings.