Bernardin Home Canning: Because You Can: Easiest Ever Marmalade

Ingredients

• 3 oranges, small, unpeeled, seeded
• 1 lemon, unpeeled, seeded
• 1 grapefruit, small, unpeeled, seeded
• 2 cups (500 ml) canned crushed pineapple, undrained
• 6 cups (1500 ml) granulated sugar
• 1/2 cup (125 ml) chopped maraschino cherries