Combine flour, salt, baking powder and shortening; mix until shortening is blended. Add water; mix well. Turn dough out onto a lightly floured board; knead until smooth, about 2 minutes. Roll dough into a ball; place into a plastic bag. Separate and roll out enough dough to make six 4- to 6-inch thin, flat rounds.
In a cast iron skillet, heat oil to 375° F. Place rounds in oil; cook each side 20 to 30 seconds or until light golden brown. Use a slotted spoon to remove rounds from skillet; drain on paper towel. Fill with prepared fillings as desired.Makes 6