Lemon Omani's are not lemons, they are limes, also goes by the name
'Limu Omani'. Typically, (Fresh) Omani limes are boiled in salt water & dried
in the sun until it sun-tanned. The color varied from pale tan (White) to dark
brown or darkened (Dark Black). Their flavor is tart, with an indescribable
muskiness & without any sweetness. These dried limes are fantastic as a
souring agent in place of lemon juice in a sauce.
Pale tan (White) to light-tan (Brown) ones are generally best, however some
of the very dark black limes have a greater pungency and depth of flavor.

Uses:
When adding whole dried limes to a dish make a few holes with a skewer or
a fork to allow the cooking juices to infuse with the tasty inside. Use them in
stews & soups or can be crushed or even powdered before adding to a recipe.