Name: tarev San Joaquin County, CA (Zone 9b) Give PEACE a chance!
There is a hollow portion in the middle, from the part I removed the dried out petals, unlike the way dragon fruit or opuntia fruits form where it really forms it oval and tight. So I was just keeping it like that, trying to see what else it will do, whether it will grow bigger or just drop off withered.
Okay, had to roll on our carpet to get that photo taken: with and without flash