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That sounds like the plumThat sounds like the plum tree we had in our yard in So Cal. It was a Satsuma plum. Reddish green on the outside and dark red to purple on the inside. I know it needs a pollinator. We had a Santa Rosa plum with it. The Satsuma was a meaty plum and the skin was not bitter.The Santa Rosa was very juicy and sweet, but the skin was tart. Hope this helps.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?