Green bean casserole

• butter↗50g g
• olive oil↗2 tbsp tbsp
• button mushrooms↗250g chestnut or g

  sliced

• green beans↗500g g

  trimmed

• flour↗50g g
• milk↗500ml ml
• crispy onions100g g

Step-by-step instructions

1. 1

   Heat 1 tbsp of the butter and the oil in a large pan and fry the mushrooms for 10-15 mins until golden. Stir in the green beans and cook for another 3-4 mins until the beans turn bright green. Scoop out the veg onto a plate.

2. 2

   Heat the oven to 200C/180C fan/gas 6. Melt the remaining butter in the pan until foaming. Remove from the heat briefly and sprinkle over the flour, stirring into the butter to make a golden brown paste. Return to the heat and add the milk, a splash at a time, continually stirring until all the milk has been added and you get a smooth, thick white sauce. Season well. Stir the beans and mushrooms into the white sauce, and spoon into a medium ovenproof dish.

3. 3

   Scatter over the crispy onions, then bake for 20-30 mins until bubbling and golden, covering if the onions brown too quickly.