Frittatas like this one are a popular main-course in the southern Italian region of Calabria. In America, ricotta is usually made from cow's milk. I have never had the fresh ricotta of Italy which is made from sheep's milk. I have made fresh ricotta and it's super simple to make! Homemade Ricotta.
Season with more black pepper, if you like.
This would be delicious with sliced Italian Sausage!