Tony's Manicotti With Four Cheeses

Ingredients

some pepper to
some salt
1 onion
160 gr mushrooms
110 gr butter
65 gr flour
950 ml milk
12 manicotti shells
1 ricotta
55 gr mozzarella cheese
60 gr romano cheese
30 gr walnuts
7 gr parsley
3 eggs
1 gr nutmeg

Instructions

golden.