Pizzeria il Capriccio, which has been a Stresa takeaway pizza staple for years already, now delivers. Their menu gives a cell phone number to call to order, as well as the restaurant number. Here's their menu, along with phone numbers and hours.
This could be helpful on some tired evening when all you want to do is stay on your balcony with a bottle of red and wait for the pizza delivery car to arrive. I do not know the limits of either of their delivery zones, but I do believe they cover all of Stresa and its outlying neighborhoods, as well as possibly some extended areas.
By the way, it is not necessary to tip the pizza delivery person, but certainly you can if you wish to.