This from the Gwinnells, recent guests from UK/USA: “Deb, Found a great café & restaurant, Páteo do Garrett, in Sintra. Off the beaten track… neat little courtyard, about 8 tables with great view. (Larger interior, VERY CLEAN.) Tourist Menu €10 with appetizers, entree, dessert, coffee and 1/2 bottle of wine. Really good value.”
To find it, walk towards the Sintra Tourism Office (with your back to the Sintra Palace), take the road to the left of the Tourismo and then loop around, hard, left again when the road allows. There’s Páteo do Garrett. Enjoy!