Cook broccoli according to package directions. Drain and set aside. In a 2-qt. microwave-safe dish, melt butter. Add onion; cover and cook on high until tender. Add flour and blend well. Whisk in broth; cook on high for 2-4 minutes or until thickened and bubbly, stirring every minute.
Add remaining ingredients except noodles. Cook on high for 1-2 minutes or until heated through, stirring once. Serve over noodles.