Decomur - Restauração, Lda.

It's a casual place where you can eat on your lunch break or for dinner, it's open until midnight, it's not fancy, but the food is really good and at a really affordable price. You can't have really complex dishes but you can have typical foods like prego no prato, bolinhos de bacalhau, cachorros, or the francesinha (typical dish of the city of Porto). They are all really really good (one of the best francesinhas i've ever had) and go great with a garrafinha of Portuguese beer. I definitely recommend it. :)