It's definitely out of the beaten track, but this place clearly deserves a stop to try "tripas enfarinhadas".
This "petisco" it's always part of a big meal, but in Catitas is the star of the show.
Pork tripes stuffed with corn flour, deep fried will deliver a perfect result together with a spicy sauce (used on another local dish -Francesinha).
You'll be surprised with the crunchiness of small bits in your mouth.
1.50€ it's the price and then try a "cachorrinho". All with Super Bock.