Preheat oven to 350 degrees Place ham on rack in roaster, bake for 30 minutes. Remove from oven and cool. Genlty remove rind, with thumb, around edge and pull back. Using sharp knife score the fat into 2 cm squares. Place a clove in each square. Place ham back in roasting pan.
Combine jam, sugar and reserved pineapple juice. Brush over ham. Cover shank with foil and bake a further 40 minutes, add pineapple to the pan and bake for 20 minutes.
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