Vegetable Au Gratin is inspired by the popular French delicacy Gratin Dauphinoise – Boiled veggies tossed in butter and generously coated in creamy sauce, topped with cheese and baked until bubbly & melty. This vegetable au gratin is a fool proof veggie side which will have your guest come back for more. The best thing about this recipe is you can prepare the veggies and sauce ahead of time. You can easily assemble this casserole & bake it just before you are ready to serve. I have used fresh fall produce for this recipe, you can add veggies of your…