Add half of the pineapple slices in a blender and blend till a smooth paste is formed.
In a large bowl with an electric beater beat in the sugar and eggs. Blend in the butter and beat on high speed for 2minutes.Mix in the vanilla essence, baking powder, and pineapple paste. Finally fold in the flour. Grease a cake mould and pour the batter into it. Bake in a microwave at 100percent M for 15 minutes.
Method for making pineapple syrup.
In a microwave safe bowl add in the remaining pineapple slices and heat ina microwave at 100% for 3 minutes.
Pour the pineapples onto the cake. Allow the syrup to settle for 15 minutes.
Carefully invert on a cake plate to cool completely.