Pineapple-Rhubarb Jam
["1 pineapple", "1 orange", "1 lemon", "7 c. cut up rhubarb", "7 c. sugar"]
["Remove top from pineapple; cut into wedges.", "Remove rind and eyes from wedges.", "Remove core.", "Cut unpeeled orange and lemon into quarters; discard seeds.", "Grind pineapple, orange and lemon in food chopper.", "Combine fruit and sugar.", "Cover and refrigerate at least 5 hours.", "Cook in large kettle.", "Heat to boiling, stirring frequently.", "Boil gently over medium heat 25 minutes until thickened.", "Fill prepared jars.", "Seal jars.", "Cool before storing."]
["pineapple", "orange", "lemon", "rhubarb", "sugar"]