In a large mixing bowl, combine the flour, baking powder, and salt. Mix well.

Gradually add the warm water and vegetable oil to the dry ingredients, stirring until a dough forms.

Knead the dough on a lightly floured surface for about 5-7 minutes until smooth and elastic.

Cover the dough with a damp cloth and let it rest for 30 minutes.

After resting, divide the dough into 8 equal pieces. Roll each piece into a ball.

Flatten each ball into a circle about 1/4 inch thick.

In a small bowl, mix the brown sugar and chopped nuts (if using). Sprinkle a generous amount of the filling onto the center of each circle.

Fold the edges of the dough over the filling to enclose it, pinching to seal tightly.

Heat a non-stick skillet over medium heat. Place the filled dough seam-side down in the skillet.

Cook for about 3-4 minutes on each side until golden brown and cooked through.

Remove from the skillet and let cool slightly before serving.