Fresh thyme. The only herb used in this casserole is fresh, floral thyme. It’s mild yet herby, and partners perfectly with the cheesy potatoes. In a pinch, you may substitute ½ teaspoon dried ...
Slice your potatoes into chips (about the thickness ... Turn down the heat on the reduced stock, then whisk in the cornflour and the diced butter. Taste and adjust the seasoning if necessary.
Put the potatoes in a medium, shallow microwaveable dish. It will need to be wide enough for the potato chunks to sit in a single layer. Pour over the stock and season with ground black pepper.