You can make and easy Japanese style carbonara using just egg yolk, milk, mentsuyu sauce and soy sauce. Try this whenever you have leftover egg yolks!
I made a pickup lunch using egg yolks left over from making macarons and whatever else I had on hand, and wow! It was so delicious.
If you make the sauce while the pasta is boiling, you can have piping hot pasta. If you make all the ingredients ready beforehand, you can work efficiently.
Enjoy Japanese food around the world.