1 orange, thinly sliced crosswise, seeded
About 1/3 lemon, thinly sliced crosswise, seeded
1 (6 oz.) can crushed pineapple in syrup
2 2/3 c. sugar

Quarter each citrus fruit slice. In large saucepan, just cover citrus fruit with water. Simmer 45 minutes or until peel is soft. Add pineapple and syrup. Simmer 15 minutes. Add sugar. Stir until sugar dissolves. Increase heat; boil rapidly 20-25 minutes or until marmalade reaches 221°F degrees. Remove from heat. Cool.