Leek & Brie Tarts. Make tart bases in patty cases out of puff pastry circles (about 6cm cutter) then blind bake (stab with fork) at 200 for about 10 mins (or until puffed but not golden). Top with cooked leek mix (fry leek, garlic, salt & pepper) and then a slice of brie, put back in the oven (reduced to 180) and bake till golden and bubbly. Everyone loves these