📝 Instructions

1. 1 Cook macaroni until just done, drain
2. 2 Make roux: melt butter, stir in flour, cook 1 min
3. 3 Gradually add milk, whisking constantly until thick
4. 4 Remove from heat, stir in most of the cheese and mustard
5. 5 Mix sauce with pasta, pour into baking dish
6. 6 Top with remaining cheese and breadcrumbs, bake 20 mins at 190C