In a large bowl, combine flour, baking powder & salt; whisk well. Add yogurt, mixing with a fork until incorporated. On a lightly floured surface, knead dough about 15 times. Divide the dough into 8 equal pieces & roll into strips about 9-inches long. Tie each strip into a ‘knot-like’ ball; place on baking sheet. Bake about 18 minutes or until golden then allow to cool 5 minutes.