A very loud SHOUT OUT out for the cousins who operate "Street Food" Located at Via dei Balestrari, 34, 00186 Roma, Italy.
A small hole in the wall. Great hamburgers, chicken burgers and dogs (on roman bread - with fixins) - prices start at Euro 2.50 for a dog and go no higher than Euro 5.00 for a double cheeseburger. Massive size burgers, the normal hamburger will set you back Euro 3.50 and it's plenty enough for a big hungry guy. The double is insanity for the price. They have chicken and BBQ pork sandwiches as well as something called La Bomba all for Euro 4.00 each. Fries as well.
This was a great find as our 10 year old daughter wanted something regular sounding in the middle of a walking day. The sign stating 4 Peroni's for Euro 8.00 caught my eye and sealed what turned out to be an excellent lunch that was much larger and far more delicious than expected. Ok so it's not pasta or pizza, but when you don't want to sit down and drop Euro 60+ and/or are a little burnt out on pizza - it's a great stop, right near CdF. Lot of locals eating there. Two owners very nice young guys.
Some menu pics (not mine - but essentially the same) are at http://www.yelp.com/biz_photos/street-food-campo-de-fiori-roma
It is located here: https://goo.gl/maps/DXAMeCRRSC22