This kiosk is in the garden next to the university where I studied. Sadly, this kiosk didn’t exist back then. It’s also near the Parliament, so if you plan to visit there, afterward you can come and have a French-style crepe (with salad at lunchtime).
Tram 28 passes at Calçada da Estrela, the street between the garden and the Parliament, go up to Estrela and visit Basílica da Estrela and the garden.
Although the name of the garden is Francesinhas’s, the kiosk doesn’t have francesinhas, only crepes and some sandwiches.