I make this all the time when I've got fresh pineapple trimmings - but make it even easier: put the trimmings, minced ginger, juice and rind of 1 lemon, plus mint sprigs (lots) in large soup pot with water.....boil all and simmer 30. Strain - add sugar if desired. Pour into empty water gallon jug. Chill. Perfect to cart to picnics and baseball games, etc.