This was a happy accident but wow.
I was making a hollandaise to cover my steak but it split.
So, since it was potentially ruined anyway, I decided to experiment and crumbled some Roquefort into it. It was the best thing about my day yesterday and it stabilised and fixed the sauce.
So as follows:
1 egg yolk,
1/2 teaspoon of wine / cider vinegar
Around 50g melted butter
About 50g of blue cheese.
Whisk your egg yolk with the vinegar until the mixture changes colour.
Slowly whisk in the melted butter until it has been absorbed.
Place bowl over a saucepan with a little water in and put it on the heat.
Whisk until it thickens (or splits like mine did - #rageface) .
Crumble in your blue cheese and continue to whisk.
Then dip every forkful of steak in it and praise the gods of keto for the wonder of the thing.