Pre heat your oven to 350 F.
Roll out your dough on a lightly floured surface to about 1/4 cm thick. You want it to be thin otherwise it will open during baking.
Using a cookie cutter or glass, cut out 2-3 inch cookies. Keep rolling out your dough until you’ve used it all.
Place 1 tsp of filling in the centre of each circle.
Fold over the right side of the circle, creating a point at the top.
Next, fold the left side of the circle so the fold overlaps the first to make a point.
Finally, fold up the bottom piece up and over the other two fold, creating a triangle.
Press corners to seal.
Place your finished cookies in the fridge for 20 minutes, until firm.
Mix the egg and water together, then brush each cookie with the egg wash.
Bake the hamantashen for 12-14 minutes until edges are slightly browned.