Combine ricotta cheese, lemon zest, and lemon juice in a small food processor (or a small mixing bowl with an electric mixer). Whip together until smooth and creamy.
Transfer mixture to a dip bowl, then drizzle olive oil over the ricotta mixture.
Sprinkle with salt and pepper, if desired.
Spoon cranberry sauce (or chutney) over the top of the ricotta mixture, then sprinkle chopped pistachios on top.
Serve and enjoy!
Notes
Serve dip with sliced baguette, crackers, pita bread, or crostini.
If making ahead of time, I recommend waiting until just before serving to add the olive oil, cranberry sauce, and pistachios.