Mix flour, salt, baking powder, and sugar in a bowl. Cut in margarine thoroughly. Add milk and stir just till it forms a ball around the fork. Turn onto a lightly floured surface and knead 14 times. Roll 1/4 inch thick. Roll cooked sausages from wide side to triangle point. Place on a greased cookie sheet. Bake at 425F for 15-20min or until light brown in colour.