I can recommend: Restaurant in Puerto Mazarron
Super helpful member
Wonderful menu del dia at La Caleta in Mazarron port. €10 per person incl 1/2 bottle of wine each for excellent meal - choice of salads ( or gazpacho) then first course with great choices including baked brie...mains equally good, then dessert or coffee.
All this gazing out at the cruisers and yachts in the marina, and half an hour from Cartagena.
Unbeatable!