Restaurant La Mina. This popular place, strategically located in a Plaza de Armas corner, offers a great variety of typical Cuban menus.
There's covered seating in three separate patios, with ferns and arbors and caged parakeets providing additional atmosphere, as well several dining rooms spread through the interior of a couple of connected buildings. The food is typical and The Traditional Cuban Combo comes with a "Mojito" or "Daiquiri", black beans and rice, tamales and shrimp in a tasty sauce, some grilled pork in sauce and dessert.
This is a good place to pass a few hours midday, or to take a break while walking around Old Havana.