ToCook linguini according to package directions until it is al dente. Meanwhile saute shrimp in large non-stick skillet on medium for 6 minutes.
Scoop shrimp out of pan with a slotted spoon and set aside. Return pan with scampi sauce to stove and turn heat up to medium high. Add onions and saute for 5 minutes until they are translucent.
Add diced tomatoes(including juice), wine, Italian seasoning and red pepper to onions.
Bring mixture to a low rolling boil. Boil mixture for 7 minutes, stirring occasionally.
Add shrimp to pan with tomato sauce and continue sauteing for 3 minutes.Add cooked linguini and toss to coat and serve with shredded parmesan cheese, if desired.