Heat 1 tbsp of butter in a pan and saute the finely chopped pineapple for 5 minutes. Remove from pan and set it aside along with the liquid.
Beat 80g of butter with sugar and add eggs. Mix well until light and pale in colour.
Add flour, almond meal, essence and sautéed pineapple with the liquid to the batter and mix well until well incorporated. Bake in a preheated oven of 175"c for at least 30 minutes or more till done. remove and let it cool down.