Our friend Claudia at A Seasonal Cook in Turkey, posted the following on her blog. Thanks for allowing me to repost Claudia!
In other words, unripened almonds. I think you have to be born Turkish in order to like these!
They are viewed here as an early harbinger of spring not necessarily a delicacy but even so, quite popular. I find it hard to understand the attraction in the land of baklava and sweet syrupy desserts.
I am almost late posting about these as spring is marching on and of course the almonds are getting riper by the day . But when you see these in the markets, you should be aware of what they are – and don’t buy them!
This what they look like: pale green and furry. You bite into them and split the case with your teeth to find the kernel inside. At the market on Monday I had one just to have another try, but no, not for me. Most definitely not. The guys on the stall obviously thought I was mad as I spat it out!
However in the restaurants it’s another story. Don’t be surprised if suddenly a vendor from the street appears at your table bearing a tray like this laden with peeled almonds. This seems to be perfectly acceptable to the establishment and if you so desire, you order a plateful like the one above.
It’s a sublime combination of freshness and texture. And only available now!
Adventures in Ankara 
I actually love the spring almonds… I soak them in salty water and then eat cold and fresh. I think they are fantastic, so let’s not discourage people from being open-minded and trying something new…