Step 1

Preheat the oven to 200C / 392F. Grease a large casserole dish with butter or oil.

Step 2

Cut the cauliflower into small florets and place along one side of the dish. Trim the green beans and lay them along the other side.

Step 3

Lay the chicken thigh fillets down the centre, with larger fillets on the edges to help with even cooking.

Step 4

Drizzle with olive oil and sprinkle with salt. Place in oven for 20 minutes.

Step 5

Meanwhile, whisk together the sauce ingredients.

Step 6

After 20 minutes, pour the mustard cream sauce over the chicken and vegetables.

Step 7

Bake for a further 20 minutes or until the chicken is cooked through and juices run clear.