Sintra Tourist Sites - cafe/cafeteria experience?

I asked a similar question several weeks ago and didn't get reassuring response. Rick Steves advice is pack a picnic lunch which will probably be out choice. Maybe hit a bakery on the way to the train for sandwiches. We always pack an insulated lunch bag for travel.

In April, 2022 I bought a sandwich at Moorish Castle. They had a small setup where they sold sandwiches, chips, drinks etc. And a few outdoor tables to sit and eat. I'm not sure about Pena Palace. There was only 1 person working, so the line was a bit slow. We didn't choose to pack a lunch since we were taking a hiking path to the Pena palace, touring the grounds, and then seeing Moorish Castle (I don't like to carry extra weight). Did bring a water bottle and protein bar.

If you visit Quinta da Regaleira, they have a nice outdoor cafe that I enjoyed in August 2021. And Monserrate has a lovely lawn that would be perfect for a picnic lunch.

Edit to add: There is a Starbucks attached to the Rossio train station. They sell local pastries and I believe they have sandwiches. Might be an easy place to grab something prior to catching the train. The buses that take you up to Pena board by the train station. It's a bit of a walk to get into the historical town where most of the cafes are located. I do remember that there is a coffee shop by the train station. I can't remember if they sell sandwiches.

The cafe line at the Peña palace was painfully slow so be aware.

Thank for for the replies! Very helpful.