I recently made custard with a huge amount of milk, custard powder and sugar. After boiling it for few minutes I added vanilla essence to it. After it was settled I added apple and pineapple. Then I placed the whole mixture in the fridge and the custard was tasting fine at that time. But after a half hour of cooling, when I tasted the mixture it was bitter. I googled about the issue and found out that milk and pineapple are not good friends, but I don't want to waste the whole thing now. Is there any way to reduce the bitterness?