Added one layer of 3 inch fiberglass tape to the galley side of the galley flat/bulkhead joint. I have painted two layers of fiberglass over the tape and will sand it prior to varnishing to make it a little less visible.
Here is the interior. I have added two layers of fiberglass tape (one 4 inch wide strip and one 3 inch wide strips). This should be plenty strong.
Next, sand, varnish and reinstall the galley.