New potatoes 'Lyonnaise'

• unsalted butter↗50g g
• olive oil↗ tbsp
• large Spanish onions↗3

  sliced

• garlic cloves↗2

  sliced

• thyme↗ tbsp

  leaves

• large new potato↗1kg g

  halved

Step-by-step instructions

1. 1

   Heat the butter in a large pan. When foaming, add 2 tbsp olive oil and the onions. Cook over a medium‑low heat until softened and golden, about 30 mins. When the onions have softened, stir in the garlic and thyme. Season and set aside.

2. 2

   Heat oven to 200 °C/180 °C fan/gas 6. Bring a large pan of salted water to the boil, add the potatoes and boil for 5 mins before draining well.

3. 3

   Mix the drained potatoes with the remaining oil and some seasoning in a large roasting tin. Roast for 30 mins, turning halfway, until golden. Stir in the onion mixture and roast for 10 mins more until hot.