Cook bacon in 10-inch nonstick skillet over medium-high until crisp; drain. Stir in onion and garlic and cook over medium heat, stirring occasionally, 3 minutes or until onion is tender. Stir in Sauce; heat through.
Meanwhile, cook pasta according to package directions, adding broccoli during last 2 minutes of cooking; drain. Toss hot mostaccioli mixture with hot sauce and sprinkle with cheese.