So you have spare egg yolks because of a minor indiscretion with a chocolate roulade, what are you to do with them?
Duh, you make cheese straws. Or in this case Cheesy Valentine Hearts. Because of Valentine's day: geddit?
My Cheesy Valentine Hearts were made with wholemeal flour and half fat cheese, because I am a masochist. They still have butter in, because I'm not yet completely insane. I strongly suggest that you use proper white flour and proper cheese for the full saturated fat experience. Alternatively, you can have them hippy chewy like I did and pretend that they are a bit healthy (they aren't).
Here is P's mum's recipe, for a modest quantity. Naturally, I made double. We will never be thin.
2oz butter or marge (butter tastes so much better)
3oz mature cheddar
1 egg yolk (I added an extra egg yolk to compensate for the wholemeal flour)
teaspoon chilli flakes (optional, for chilli addicts)
Combine all the dry ingredients, then add the egg yolk. It's that hard. It's even harder if you use a food processor. Roll out to 1/4 in thick on a floured surface, and either cut into strips about half an inch thick or have fun cutting out pretty shapes. I used stars at Christmas, and am now looking for an excuse to use my flower-shaped cutter. lay on a baking sheet* and cook at Gas mark 8 (450) for 5-9 minutes. You do need to keep an eye on them because the window between 'nicely browned' and 'burnt and horrid' is quite a narrow one.
*they have so much fat in them that there's no need to grease, but they will stick a bit because of the cheese meltage. A fish slice is handy for scraping them off, and if they break you are allowed to 'test' them. Them's the rules!