In a mixing bowl, combine flour, sugar, and salt. Add cold butter and mix until crumbly.

Gradually add cold water until the dough comes together. Form into a ball, wrap in plastic, and refrigerate for 30 minutes.

In a saucepan, combine diced apples, brown sugar, cinnamon, lemon juice, and cornstarch. Cook over medium heat until apples are tender, about 5-7 minutes.

Roll out the dough on a floured surface to about ⅛ inch thick. Cut into circles using a cookie cutter.

Place a spoonful of apple filling in the center of each circle. Fold over and seal the edges with a fork.

Heat vegetable oil in a frying pan over medium heat. Fry the pies until golden brown, about 3-4 minutes per side.

Remove from oil and drain on paper towels.

Serve warm, optionally dusted with powdered sugar.