COOK pasta as directed on package; drain.
MIX broth, tomatoes, steak sauce and crushed red pepper in large saucepan; bring to boil on medium-high heat. Boil 3 minutes.
ADD pasta and spinach; stir. Return to boil. Reduce heat to medium-low; simmer 2 minutes. Stir in meat; cook 2 to 3 minutes or until meat is cooked through.