Heat large nonstick skillet over medium heat until hot. Combine walnuts, 2 Tbsp. plum jelly, and water in skillet. Cook and stir continuously 5 minutes or until walnuts are slightly glazed. Transfer to plate; spread to separate.
Remove beef pot roast from package. Measure 3/4 cup of the gravy and place gravy in same skillet. (Add beef broth or water to equal 3/4 cup if necessary.)
Add 1/2 cup Hoisin sauce and 2 Tbsp. plum jelly to skillet. Heat over medium heat until hot, stirring occasionally.
Cut pot roast into 1-inch pieces; add to skillet. Cook over medium-low heat 5-6 minutes or until beef is heated thoroughly, stirring occasionally.
Spoon beef mixture and walnuts over cooked rice and broccoli.
