Place Iamb on rack in shallow baking pan, fat side up.
Roast at 325 °F.
2 hours 20 minutes or until done (35 to 40 minutes per pound or 175°F.on meat thermometer).
Spread marmalade on meat last 30 minutes of roasting.
Remove meat from pan.
Spoon off excess fat, saving drippings.
In roasting pan, add remaining ingredients to drippings.
Heat, stirring to loosen browned bits.