As we like to say about many things in Cuba, it is a country experiencing continuous change.
Due to trade embargoes and the general economic situation, Cuba might not (yet) be known as a culinary destination and its cuisine is typical island cuisine incorporating local seafood, seasonal fruits and veggies with African, Carribean, Spanish, and Native American influences. Rice and beans are a popular staple.
The influx of tourism is helping to bring about more refined cuisine and on tour, you will experience the whole authentic spectrum from simple fare to more sophisticated dishes. Breakfast will always have eggs, toast and fruit and expect lunches and dinners to have some combination of fresh seafood or chicken, rice, beans and fresh fruit.