Add flour, salt, sugar, butter and 3 tablespoons of water into a food processor.
Process for 10 seconds. Add additional water, 1 tablespoon at a time, processing at least 10 seconds after each addition. When a dough begins to form, remove from processor.
Divide dough in half and roll out one square onto a lightly floured surface. Place into square baking pan. Press dough into pan making sure it comes up the sides about an inch.
Spoon cherry filling onto dough.
Roll out remaining dough onto a flat surface and cut into 10, ½ strips. Place five strips onto the top of the filling. Fold every other strip back. Lay the first strip across in the opposite direction.
Continue this pattern, folding back every other strip each time you add a strip.
Trim the ends with a knife and press together with a fork to seal the strips to the bottom of the crust.