Preheat oven to 200

Melt butter on a medium heat on the hob

Boil cauliflower and broccoli together on a high heat until soft (continue making sauce while these are cooking)

Add flour to butter, stir with wooden spoon to make a roux

Slowly add the milk, stiring throughout

Add in cheese, stiring throughout to required thickness. if it becomes too thick add a little more milk

Place cauliflower and broccoli into an oven proof dish, pour cheese sauce over the top and sprinkle grated cheese on top

Bake in oven for 15-20 mins until cheese has melted

Tuck in!!