Sausage Alfredo Bake

Sausage alfredo bake via Let's Dish
16 oz pasta
3 T butter
2-3 cloves garlic, minced
3 T flour
1 c chicken broth
2 c half and half
1/2 t salt
1/4 t pepper
1/4 t cayenne pepper
1/4 t red pepper flakes
1/2 c grated Parmesan cheese
2 c  mozzarella cheese, divided
1-2 T chopped fresh parsley
1 (12 oz) fully cooked smoked sausage

Cook pastail just al dente; drain.While pasta cooks, melt butter in large skillet over med heat. Add garlic. cook 1-2 min. Stir in flour. Whisk in broth til smooth, then half and half. Add salt, pepper, cayenne, and red pepper flakes and simmer til sauce thicken, 5 min. Stir in Parmesan and 1 c mozz til cheeses melted and smooth. Slice sausage into 1/4" pieces and add to sauce, along w chop parsley and pasta. Season w salt and pepper if needed. Preheat broiler. Pour into greased, 9×13 dish. Top w remaining mozzarella. Broil 2-3 min or til cheese is bubbly and golden.