Baked Chicken Pot Pie Pasta

butter, divided

olive oil, divided

boneless chicken breasts, cut into cubes

coarse salt and fresh black pepper

Italian seasoning, divided

small yellow onion, diced

medium carrots, diced

big stalk celery, diced

garlic, minced

peas, fresh or frozen

all-purpose flour

chicken broth

whole milk

shredded mozzarella cheese

grated Parmesan cheese

elbow macaroni, cooked (about 2 + ½ cups dry)

single pie crust, (I like this one)