Well on the plus side I HAVE found the last two remaining hearts, one of which was indeed underwater (and right under my nose) while the other was on the second-biggest island in such a spot that should've been obvious to me. Still no recipe yet
edit: Can confirm that Green orb makes girls bring...
If I managed to find it sure. I wish there was Hearts photo guide. I ran underwater so much I used up all my bags and hadn't found them anywhere.
Is there one for tiredness?
Damn I'm still missing 3 hearts!
The remaining recipe should be for the Cat's eye elixir If I'm not mistaken.
However I haven't found it either, but I looked all over the temples and didn't find it. It might be on the island with the brick statues temple.