Chicken & mushroom Hotpot

Heat oven to 200C/180C fan/gas 6. Put the butter in a medium-size saucepan and place over a medium heat. Add the onion and leave to cook for 5 mins, stirring occasionally. Add the mushrooms to the saucepan with the onions.

Once the onion and mushrooms are almost cooked, stir in the flour – this will make a thick paste called a roux. If you are using a stock cube, crumble the cube into the roux now and stir well. Put the roux over a low heat and stir continuously for 2 mins – this will cook the flour and stop the sauce from having a floury taste.