Ingredients:
18 to 20 jumbo pasta shells
1 tsp salt (plus more to taste)
15-30 oz Alfredo sauce (1-2 jars)
1/2 tsp coarse black pepper
2 cups cooked, chopped chicken
2 cups steamed, chopped broccoli
1/2 cup grated Parmesan cheese
1 cup grated mozzarella cheese