Sheryl- I usually just put in a bag of frozen mixed vegetables and a couple of potatoes I pre cook, I'm actually doing that right now. I had some carrots in the fridge that needed to be used so they are going in. I just boiled them, but I bet they would be good roasted. I also have some frozen peas. I'm basically cleaning out the fridge and freezer so I don't have to go to the store. I got a great deal on pillsbury pie crust and I have a few in the freezer so I'll use those. After thanksgiving, I made a couple of turkey pot pies, but I first lined the pie plate with plastic. Then when they were frozen I popped them out of the plate and wrapped well. Then when I took them out of the freezer I just put them back in the pie plate. I like to sprinkle a little salt and pepper over the crust before I bake it. Well that was long, to answer your question I used frozen mixed veg and potato, but I think leeks would be really good.