Preheat the oven to 170,℃ and prepare size 9 baking tin.

Mix the first 50 gms of butter and 50 gms sugar, whisk together until fluffy. Pour in the baking tin and arrange the pineapple as shown in the pic below, putting a Cherry in the middle

Beat the remaining butter and sugar, add the egg one at a time. Fold in the flour with juice, don't overmix.. pour onto of the pineapple slices. Bake for 35 to 40 minutes.

Final product