Combine all ingredients in your blender or food processor and blend until smooth.
Lightly grease your spring form pan then fill with your blended mixture. Cover pan tightly with foil.
Place 2 cups of water in the bottom of your pressure cooker.
Insert your spring form pan on a wire rack or steamer insert.
Cook under pressure for 25 minutes (high or standard pressure)
Allow to naturally depressurize then remove from the pressure cooker and remove foil. Transfer to a cooling rack for roughly 1 hour. then chill in the refrigerator for at least 1 hour prior to serving.