Homemade egg-white mayo. Had two leftover egg-whites from yesterday's amazing carbonara, so I decided to make something with them. It's great, almost the same as the one you buy at the grocery store, but a bit richer in texture (and with a significantly lower shelf life). So simple to make as well.
But, after realizing I just put a cup of oil in it, I don't think I'm gonna make it again. It's great, just not really healthy.