La Montecarlo
The crusts on the pizza at this casual, perennially popular spot just off the Piazza Navona are super-thin and charred around the edges a little—the sign of a good wood-burning oven. This is one of a few pizzerias open for both lunch and dinner, and it's busy day and night. Service is brusque, so don't expect to be invited to linger, but prices are low. When the weather is nice, there are tables outside, making this one of the most pleasant places for a cheap meal in the neighborhood.