Preheat oven to 400 degrees. Microwave 10 bacon slices in batches, between paper towels at HIGH for 1 1/2 minutes. Cut slices in half crosswise.
Wrap bacon piece around each Brussels sprout half; secure with a wooden pick. Place sprouts, cut sides down, on a lightly greased wire rack on a baking sheet. Sprinkle with pepper to taste. Bake for 20 to 25 minutes or until bacon is crisp and Brussels sprouts are tender. Serve with Creamy Mustard.
Creamy Mustard Sauce: Stir together all ingredients. Makes 1/2 cup.