Place the flour, salt, butter, cheese, and one beaten egg in a mixer bowl equipped with the guitar attachment. Mix the ingredients to form a cohesive dough.
Divide the dough into three pieces and roll each piece into a 2 inch thick log. Wrap in plastic wrap and place in the freezer for 30 minutes, or until dough in frozen.
In a small tray, place your topping of choice.
Remove the dough logs from the freezer. Brush each log with the egg wash, then roll it in the topping, making sure it is fully covered.
Slice into ½ inch slices and place on a baking sheet lined with parchment paper.
Bake in a 360F preheated oven for about 20-25 minutes, until the cookies are slightly golden.