Thaw frozen peas and corn. Shred or cube the rotisserie chicken. Pre heat the oven to 375° F
Cook the noodles according to the instructions on the packet. You want them al dente.
Heat butter in cast iron skillet (see note 1) over medium heat. Add onion, carrots, celery and garlic and sauté for 3-4 minutes. Season with salt and pepper.
Add in flour and cook for a minute stirring continuously.
Stir in chicken broth and cream and cook stirring for 3 minutes, till the sauce thickens up a bit.
Add chicken, peas and corn, and noodles. Mix well.
Mix parmesan and panko in a bowl and sprinkle it evenly over the top of the casserole.
Pop this casserole in the oven to bake uncovered for 25-30 minutes.
Remove from oven and allow to cool for a few minutes before serving.
