This is a perfect comfort meal for cold wintery nights, from Pie Squared Slab Pies cookbook by Cathy Barrow.
Make Ahead: Cook the cauliflower filling up to 4 hours in advance.
Some steps can be done together. For example, while the dough is chilling make the cauliflower filling. While it cools, roll out the dough and drape one piece into a baking pan.