
Quickly scoop the mixture into the bowl of an electric mixture fitted with a whisk attachment and beat at medium high speed until the mixtures thickens considerable and looks like wet taffy (like in the photo below). Remove the bowl from the stand mixer and scoop the whipped cream into the center of the bowl on top of the custard. Fold the whipped cream into the custard until they are completely combined. Add the shortbread bits, cinnamon oat crumble, and roasted plumcots and fold gently until they're just evenly distributed.
Notes: Requires 6 hours in freezer