01 -
Place 180 ml heavy cream in a large bowl and set a mesh strainer over the top. In a medium saucepan, combine remaining 180 ml heavy cream, whole milk, granulated sugar, salt, and vanilla over medium heat. Stir until the sugar dissolves and mixture begins to steam.
02 -
In a separate bowl, whisk the egg yolks. Gradually ladle 240 ml of the hot milk mixture into the yolks, whisking constantly to temper. Return egg mixture to saucepan.
03 -
Cook the mixture on medium heat, stirring continuously until it thickens and coats the back of a wooden spoon or spatula. Pour through the mesh strainer into the reserved heavy cream. Discard any solids. Cool over an ice bath to room temperature.
04 -
Transfer the cooled custard and apple butter to a blender and process until completely smooth. Pour into a bowl, cover, and chill in the refrigerator until thoroughly cold, preferably overnight.
05 -
Preheat oven to 190°C. In a bowl, mix flour, oats, brown sugar, cinnamon, and melted butter by hand until combined. Break mixture into pieces no larger than 1.5 cm, spread evenly on a 33 x 23 cm baking pan. Bake for 10 minutes, then cool completely.
06 -
Churn the chilled custard according to your ice cream maker's instructions. In a freezer safe container, alternate layers of churned ice cream and oatmeal crumble. Freeze until firm.
07 -
Scoop and serve with salted caramel sauce and whipped cream if desired.