I’m happy I tried the Francesinha. I enjoyed Porto.
I ordered my Francesinha at the café inside the Infante Sagres hotel. It isn’t offered on the current menu.
I also had a nice visit on a day trip along the Douro River to a vineyard and some villages. My recs are out-of-date. I haven’t been since 2009.
There’s a duck rice dish called Arroz de Pato that you also might find. It’s on the menu here https://m.facebook.com/tabernamercadores/
I don’t love tripe so I didn’t seek it out in Porto.