lol I found the same plant today in my garden and was able to look it up on the net to figure out what it was then posted about it on the sedum forum.
The thread "Sedum and related succulents Chat 2016" in
Sedum forum page 21
That's so funny 2 people where wondering about the same plant only 2 hours and 31 minutes apart
by the way it's edible
I like it and it's non edible look alike Euphorbia maculat. To me they look great and serve as great ground covers cooling the soil but letting other plants grow through them.