I'm sorry but I'm afraid that's a little too exotic for my taste, I've seen stuff like that on Chopped.
I'd Google for a recipe and see what I came up with.
According to an article I read in Mother Earth News an egg will stay fresh and good to eat in the refrigerator for 6 months. Mine never last that long.
I put mine in cartons and mark them with a date on a piece of masking...
What works even better is using the vinegar then subbing sour cream for half of the milk and stir well. It is nice and thick like real buttermilk and give the recipes a nice moistness.