Azimut
There are plenty of beach bars and restaurants on the esplanade between Cascais and Estoril, but this one at Monte Estoril, a 10-minute walk from either town, is the pick of the bunch. Right by a small sandy beach called Praia das Moitas, the vibe is peaceful and there's a broad menu ranging from snacks, hamburgers, toasted sandwiches, and salads to seafood and fish.