Depending on your preference, ricotta pie can be served at room temperature or cold. If you prefer a firmer texture, refrigerating the pie for at least 1-2 hours before serving can help it hold its shape better and make it easier to slice. On the other hand, if you prefer a softer and creamier texture, serving the pie at room temperature is a good option. Ultimately, it comes down to personal preference and the desired texture of the pie.