Possible Clues:

• Is the boy from South Africa at home with the Moslem ruler?
• The leader of the Muslims against the Crusaders in Palestine, defeated at Acre in 1191
• Enemy of Richard I in the Crusades
• Lionheart's foe has healthy food at home
• Healthy food at home for Lionheart's foe
• Old sultan’s envy, perhaps, about a young man
• What healthy dish could have? This one would have had sultanas
• Crusaders' opponent
• Sultan unfortunately upset -- row ensues
• Sultan's son and daughter abandoned by character in panto