Step 1

Heat the grill to high and bring a large pan of salted water to the boil. Grill the bacon slices for 5 mins or until crispy, then drain on kitchen paper and cut into small pieces.

Step 2

Cook the pasta following pack instructions. Add the cauliflower to the pasta pan for the final 8 mins, so that it is just tender, then drain, reserving 2 tbsp of the cooking water.

Step 3

Melt the butter in a small pan over a low heat, then stir in the flour and cook for a couple of mins. Gradually stir in the milk, mixing well between each addition. Bring to a simmer, then cook for a few mins until thickened. Season, add the mustard and half the grated cheese. Stir until the cheese has melted and the sauce is smooth.

Step 4

Tip the pasta and cauliflower back into the pan along with the reserved cooking water. Stir through the cheese sauce and bacon, then transfer the mix to a baking dish. Mix together the breadcrumbs and remaining cheese, then sprinkle over the pasta. Cook for 5 mins under the grill until browned. Serve with a salad, if you like.