We ditched the pie plate for this slab. Frankly, we always had issues with those glass pyrex dishes anyways. And if pies are lacking anything, it’s a crispy crust. Any of your Baking Steel products are going to do an amazing job of blasting even heat from below. That's truly one of the incredible benefits of having a Baking Steel inside your oven. Even when making pies, the temperature is going to remain constant. If you are baking pizzas at 500 F or pies at450 F or even cookies at 350F, your home oven is going to benefit wildly from having a Baking Steel inside.
You are going to want to use parchment paper or a silipat when assembling your pies. Otherwise, the juices from the apples will spill out onto your Steel and create a little havoc. And that makes for a messy Steel.