Make the honey cream: Combine milk, honey, cornflour, vanilla, egg yolks, and salt in a saucepan. Cook while stirring until thickened. Off the heat, stir in cream cheese.
Cool the cream: Transfer cream to a baking sheet, cover with cling film touching the surface, and refrigerate for over 2 hours.
Assemble the trifle: In a large glass container, layer the cream, granola, and strawberry jam. Repeat the layers.