Bring a pan of water to the boil, add the pasta and cook for 10-12 minutes until tender, drain and set aside. While the pasta is cooking prepare the rest of the dish.

Bring a small pan of water to the boil, add the broccoli and cook for 2-3 minutes, drain and set aside.

Melt the butter in a large heavy based pan, add the flour and allow to cook stirring constantly for 2 minutes.

Remove from the heat and gradually add the milk, stirring or beating with a metal whisk between each addition so no lumps form. Return to the heat and stir constantly until sauce thickens.

Add the mustard and mix thoroughly.

Add two thirds of the cheese and stir until it melts.

Add the cooked pasta and mix gently until it is coated with sauce.

Add the broccoli and mix gently. Taste, season with salt and pepper if required.

Transfer to a heat proof serving dish, sprinkle over the remaining cheese and place under a hot grill.

Serve with salad and crusty bread.