Name that fruit!

One of the joys of moving into a new home is watching the landscape bloom for the first time. You never know what previous residents have planted, until you see the flowers unfold. Early this spring, one leggy plant I assumed was a weed turned out to be a gorgeous yellow lily. Glad I didn't pull it out!

Currently, a tree in our backyard is producing a type of fruit that I don't recognize (I usually stick to grapes and bananas). If any of you know what it is, please leave a comment to enlighten me!

Thanks!