Looks like a Natal Plum, also called Boxwood. Fruit edible but other parts of the plant poisonous if ingested.

Thanks!

Good thing you got the edible and poisonous parts sorted out since you already ate one!!!

That's for sure. Although, I knew Tacogirl had lived to tell the tale...

I also think they are coco plums. The ones I've had remind me of a "snow apple" in taste and consistency. I didn't know the other parts were poisonous though. Good thing I didn't chew on the limb.