step 1
Rub butter and Flour together till they resemble bread crumbs
step 2
Add salt and pepper, grated cheese and marmite and mix into a firm dough.
step 3
Using your hands, roll into thick sausage shape, wrap in clingfilm and place in the fridge for an hour. (May be frozen at this stage)
step 4
Remove from clingfilm, slice thinly and roll again to the required size and place on grease baking tray. (Roll in sesame seeds if required)
step 5
Brush with beaten egg whites and bake at 200c for 10mins or until golden brown. Cool on rack