Drain The Pineapple, Reserving 2 Tablespoons Juice; Set Pineapple Aside (Discard Remaining Juice Or Save For Another Use). In A Saucepan, Combine The Juice, Butter, Brown Sugar And Cinnamon; Cook And Stir Over Medium Heat Until Sugar Is Dissolved. Set Aside. Place Sweet Potatoes In Another Saucepan And Cover With Water; Bring To A Boil. Reduce Heat. Simmer, Uncovered, For 10-12 Minutes Or Until Potatoes Are Tender; Drain. On Metal Or Soaked Wooden Skewers, Alternately Thread Sweet Potatoes, Green Pepper, Ham And Pineapple. Brush With Brown Sugar Mixture. Broil 4 In. From The Heat For 4-6 Minutes On Each Side Or Until Heated Through And Peppers Are Tender, Basting Occasionally.