There are plently of cheap eats at the comedores in and around the market right next to the church, Iglesia Cristo Negro. For $2-3 you can get a tasty meal and a drink.
A bit more expensive is the R&R restaurant, they have great steaks and service, meals $6-10. Corner of Mereditas Careres and 1a Av Sur.
Restaurante la Guadalus has good Mexican food and a laid back atmosphere, meals $4-8. Corner of Mereditas Careres and Av Daniel Cordon Sur
