In a bowl, combine flour, baking powder & salt; cut in 1/2 cup margarine until mixture resembles coarse crumbs. Make a well in the dry ingredients, add milk & mix lightly with a fork to make a stiff dough. Knead 10 seconds on a floured surface then roll out to a 12 x 10 -inch rectangle. Preheat oven to 375 F. Spread dough with 2 tbsp margarine; sprinkle with sugar & cardamom spice.