Ah that’s the nice thing about pot pies you can put in whatever you want. I only did one big one in a rectangular glass dish. (Fed more people) When it was just the two of us I went pie plate size. I did a rolled out pie crust every year until later years, older and lazy, I made square ones using two puff pastry dough sheets. I would use turkey, mushrooms, onion, stuffing chunks, any veg leftover, gravy with maybe cream of mushroom soup if not enough gravy. With puff pastry you can put it together in about 10 minutes. Hubby looked forward to it every year more than the actual turkey meal.
Ok! Leave out the peas and carrots, add mushrooms, stuffing, whatever! That could work! I had not considered to work outside the box of the family recipe that I grew up with. I hated it. Now I will remember to be more creative. Thanks for the tip!