Step 1 of 3
Boulangère Potatoes
Heat the oven to 200°C/Fan 180°C/Gas 6. Fry the onions and thyme sprigs in the oil until softened and lightly coloured, about 5 minutes.
Step 2
Spread a layer of potatoes over the base of a lightly oiled 1.5-litre gratin dish. Sprinkle over some onions and continue layering, finishing with a layer of potatoes. Pour over the stock.
Step 3
Bake for 50–60 minutes until the potatoes are cooked through and the top is golden and crisp.
