UK here. 'Macaroni cheese' was one of my mum's staple meals 50 years ago. I still make essentially her recipe when I need some quick comfort food. With a really powerful UK-style Cheddar; it's too bland with anything less than a strength 4 cheese.

Recipe: Cook macaroni, or other short pasta

Meanwhile...

Melt butter

Stir in flour to get soft paste

Stir in milk and grated cheese

Stir until sauce cooked

Combine pasta and cheese sauce

Grill or oven bake for five to ten minutes