Preheat oven to 350 degrees. Lightly spray an 8 x 11 pan with non-stick spray & set aside.
Bring a large pot of salted water to boil. Add pasta to the boiling water, stirring frequently until it's cooked (I like mine al dente, Mr. likes his soft).
While the pasta is cooking, chop up the sun dried tomatoes.
Once the pasta is done, drain it and put it back in the pot. Add the jar of alfredo sauce (I used just shy of the whole jar - I don't like really saucy pasta), peas, shredded cheese, Parmesan cheese and tomatoes. Season with freshly ground black pepper and stir to fully combine.
Transfer to the prepared pan and sprinkle with more shredded cheese, if desired.
Cook for approximately 20 minutes until cheeses are melted and peas are thawed.
Serve topped with more shaved Parmesan and pepper (if you're me).