...Braise mushrooms in butter till nicely browned up, add capsicum n toss, remove on a platter... In same pan add little oil and keep on flame add onions n 1 tsp sugar, caramalise the onions till browned up... Remove on same platter let it cool down then toss all with mozarella cheese and keep aside... Cut puff pastry in squares n roll slightly press in centre with yor thumb, brush with beaten egg and bake on 200 C till creamish brown color remove and top up with mushroom mixture and bake till cheese melts...