STAR APPLE (VU XUA)

These were labelled at Viet Mangoes at the supermarket that I bought them from.  However when I cut it into two, the fruit does not resemble a mango at all in looks and taste.   I bought two, I kept one and gave the other to Lai Yoong. So far I have yet to taste them.  It tastes sweet.
A quick check on the Internet has the name of this fruit as Star Apple or Milk Apple.  It is grown in Vietnam. I guess that is why it got labelled as Viet Mangoes.