Lasagna rolls with ham and mushrooms

Lasagne rolls with ham and mushrooms
For 10 rolls:
5 rectangles of fresh pasta
500 g of mushrooms
3 slices of ham
50 g of butter 50 g of
flour
40 cl of milk + 10 cl
40 g Grana Grana Panado Galbani + 20 g Parsley
Pepper and ground salt