Made a pineapple and mint drink yesterday, and it turned out horrifically, easily the most disgusting thing I have made in recent times. Now I understand:
"Pineapple contains active enzymes that can derail some recipes. For example, if you cook the fruit with milk or cream, the mixture will become bitter. You can avoid this by just pre-cooking the pineapple and then adding it to the cream/milk recipe. The enzymes also interfere with gelatin and will prevent it from setting but if you pre-cook the pineapple and then add it, the gelatin will be fine."