Preheat oven to 375 degrees F.
Scoop out stems from mushrooms and discard. Peel caps using your fingers.
Fill each cap with 1 tablespoon sausage, packing it tightly and mounding it on top.
Spread 1/4 teaspoon plum sauce on each mound of sausage. Place on baking
sheet and bake for 15 to 18 minutes.
Meanwhile, heat remaining plum sauce in a small saucepan until bubbling. Keep warm.
Place mushrooms under broiler for 30 seconds. Arrange on a plate. Serve with warm
plum sauce in small shallow bowl.