- Preheat oven to 200°C.
- Add water and salt to a pan and boil.
- Add the pasta and boil until it is half cooked then drain the pasta.
- Melt the butter in a medium saucepan and add the flour. Mix well.
- Slowly add the milk while stirring (add in a 1/4 at a time).
- Add in the cheeses, leaving a little bit aside for the topping, and continue to mix together until the cheese has melted.
- Add the mustard and mix into the sauce well.
- Add the pasta to the sauce and mix until all the pasta has been covered.
- Place into an ovenproof dish and sprinkle the top with the leftover cheese.
- Cook for 20 - 30 minutes (it will need another 10 once the crumb has been added).
- Roughly chop the stale bread and place into the Hand Blender chopper attachment and chop to make bread crumbs.
- Fry the chopped bacon in a pan and once cooked add in the bread crumbs.
- Continue to cook until the bread is golden in colour.
- Add to the top of the macaroni cheese and put back in the oven for another 10 minutes.
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