First guess? P. belotii, an alata/caerulea cross. The leaves look right.

Second guess would be P. allardii, a Constance Elliott/quadrangularis hybrid, but the leaves don't seem quite as good a match.

I ditto jblaschke first two guesses.

I HAVE THIS ONE TOO - i PLUCKED IT FROM THE WILDS. iT NOW HAS A LOT OF FRUITS AND i AM WONDERING IF THEY ARE EDIBLE