Strange fruit from China

This strange fruit is from China. It's size is petite. Fits in my palm. The one I have here
has been marinated with some spices. It tastes sweet and tangy. The more you bite into it, the
more spicy it gets. The interior contains a seed that looks like a macadamia nut. I was told that I was suppose to eat the outside as well.
Does any one know what this fruit is called?