Cook pasta according to package directions, adding broccoli the last 3 to 4 minutes of cooking; drain, reserving 1/2 cup of the pasta water. Return pasta mixture to pan; keep warm.
Meanwhile, in a blender or food processor combine beans, Alfredo sauce, garlic, and the reserved pasta water; cover and blend or process until nearly smooth. Transfer to a small saucepan; heat through over medium heat, stirring frequently.
Spoon sauce onto serving plates. Top with pasta mixture, crushed croutons, crushed red pepper and a drizzle of olive oil. Makes 4 servings.