Heat oven to 350~. Grease and flour a 12 cup bundt pan. Measure all ingredients into lg. Mixing bowl. Blend 1/2 min. On low speed, and then 3 minutes on high speed (scraping constantly). Bake 55-60 mins turn out and cool, pour rum sauce over top. Rum Sauce; Combine nectar and sugar in saucepan, bring to a boil stiring often. Simmer 8 minutes. Blend cornstarch and water to a smooth paste. Stir into hot sauce. Cook stirring constantly until sauce thickens and clears. Slightly cool and add rum and orange slices.