I think this is a hot deli/bakery/patisserie where locals get food! I stopped in impromptu to get some dinner after seeing the line. I tried the pasta della nonna, stuffed pork, and a couple of choux crème a(pistachio and café). Everything was delicious and the lady serving was incredibly nice and patient in spite of the language barrier and the long line. Highly recommend coming here on your way to/from the Sondrio metro. Cheap, convenient, delicious.