Because I grew up in the Third World, where wastefulness is not a way of life, I like learning tricks to avoid just throwing things away.
A Peruvian friend taught me this recipe: boil pineapple peels for about 20 mn. in a panful of water, with a few spoonfuls of sugar/honey if you wish, or some cinnamon. Strain. Drink chilled or hot, for some exotic warmth in the heart of the winter. This delicious infusion cleanses the kidneys, and leaves your house smelling divine.