In a food processor, process the sugar and butter until incorporated.

Mix the flour, salt, potato starch and baking powder in a bowl then add it to the food processor followed by the egg.

Pulse the mixture until a dough is formed.

Wrap the dough with plastic wrap and refrigerate for a minimum of 1 hour. Remove from the refrigerator 10-15 minutes before baking.

Preheat oven to 350F Line a 13x9  baking pan with parchment paper and grease the sides.

Roll the dough and flatten it evenly inside the baking pan. Using a fork prick it thoroughly and bake it for 10-12 minutes.

While the dough is baking make the streusel by creaming the sugar butter and honey together, add the flour and gently mix with a fork until pea sized lumps forms.

Remove from the over let cool for bout 10 minutes.

Evenly spread the filling and sprinkle the strudel on-top.

Bake for20-30 minutes until the streusel is golden brown. Allow the bars to completely cool before slicing.