Plum-like grapeish white fruit things?

I was just at Panda's, the Chinese food chain, and they had these strange little white fruits that I couldn't identify. They had been pitted and had a texture similar to a skinned grape only slightly chewier, and were quite a bit larger than a grape. They had a flavor that to me seemed similar to cantaloupe and plum all in one. They were roundish and shaped like miniature pitted plums.