Step 1

Preheat oven to Spray a casserole dish with cooking spray. Spread 1 cup of alfredo sauce in the bottom of the dish.

Step 2

In a large bowl combine remaining alfredo sauce, broccoli, mozzarella cheese, and 1/2 cup parmesan cheese. Stir until combined.

Step 3

Spoon broccoli mixture into pasta shells. Place side by side in baking dish (it's okay if they're touching). Sprinkle remaining cheese over shells.

Step 4

Bake for 15-20 minutes until heated through and cheese is melted. Sprinkle with chopped parsley if desired and serve.