Recipe
One pot mac and cheese
I have been meaning to post it but the Greggs mention reminded me. I don't know about the Greggs Mac and Cheese as I never go there but I found about about it from an article in New Scientist of all places and was intrigued. It is now my go to recipe, even with a bit of toasting on the final product. No roux to make. Variants are easy as well.
http://archive.today/2025.04.05-082501/https://www.newscientist.com/article/mg25634143-000-how-to-hack-your-macaroni-cheese/ (archive of NS)
https://www.theguardian.com/business/2025/may/20/greggs-sales-mac-and-cheese-iced-tea-prices