Preheat oven to 425°. In a small bowl, mix the first 6 ingredients., Unroll pizza crust; cut into 16 squares. Press squares onto bottoms and up sides of 16 ungreased muffin cups, allowing corners to hang over the edges., Spoon 1 tablespoon sauce mixture into each cup. Top with cheese, mushrooms, broccoli and pepperoni. Bake until crusts are golden brown, 10-12 minutes. Serve with remaining sauce mixture, warmed if desired.