Step 1

Cook pasta according to directions.

Step 2

In a large skillet add olive oil, garlic and onions. Saute over medium heat until onions are tender.

Step 3

Add cooked chicken, mushrooms, spinach, Italian seasoning, black pepper, salt, milk and flour. Stirring constantly until sauce thickens.

Step 4

Stir in pasta and pesto.

Step 5

Add pasta to a 2 1/2 quart casserole dish and top with mozzarella cheese.

Step 6

Bake for 20 minutes.