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
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.
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.
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.