Pineapple Upside Down Cake with Custard

Name: Pineapple Upside Down Cake with Custard
Prep time: 10 min
Cook time: 1 h
Total time: 1 h
Yield: 8 slices
Ingredients: 50 g unsalted butter; 80 g light brown sugar; 5 - 6 tinned pineapple slices, in juice; 8 - 12 glacé cherries; 150 g unsalted butter; 150 g light brown sugar; 150 g self-raising flour; 3 medium eggs; 1 tsp baking powder; 1 tsp vanilla extract; 500 g milk; 50 g sugar; 15 g cornflour; 1 medium egg; 1 tsp vanilla extract