When you climb to the top of LaRoca you will pass some very well preserved stone ovens. This same type of oven is still used all over southern Italy to make those excellent pizzas.
The flattened dome shape of these ovens are specifically designed to cook food by focusing the heat onto the food placed on the floor of the oven. Like a lens focusing light. A traditional bread oven will be a bit more domed.
Some of these century old ovens are in good enough shape that you could fire them and make a very nice pie.
The Northern border of Sicily is not very good for beaches, most of them are made by gravels, so they are not very comfortable to lie over. A few exceptions in Cefalu, San Vito lo Capo and maybe a few other places. Anyway, the waters are perfect, provided you accept to made without the sand.