I feed my Mbuna New Life Spectrum sinking pellets, TetraCichlid flake, Hikari Bio-Pure freeze dried brine shrimp, on occasion Wardleys freeze dried Tubifex worms, and on a very rare occasion some freeze dried bloodworm.
Then I also feed boiled/deshelled peas once a week(go crazy for it), also some blanched zucchini and cucumber about bi-weekly..,... if someone has other suggestions of "human food" please let me know so I can try it out.... but out of all the things I feed they seem to love the peas the most.