In 4-cup glass measure, combine apricots, nectar, water, honey, lemon juice and cinnamon.
Heat at high3 to 4 minutes, or until mixture boils.
Blend cornstarch with orange juice.
Stir into glaze.
Heat at medium 5 minutes, or until glaze boils and is thickened.
Stir twice; reserve.
Season roast with pepper, place fat-side up on a microwave oven safe roasting rack set in oblong dish.