After whisking for what seemed like an eternity, it was time to add the second half of the lemon juice... but I added the leftover egg white. Doh!
I went ahead and added the lemon juice and it seemed like all was well. Into the fridge it went.
And there it sat until the following morning when we gave it a taste.
I don't know exactly what went wrong, whether it was the safflower oil (which was quite old) or the extra egg, but it was not eatable.
Will I try it again? Or move on to another episode? Who knows.