2Place the lamb in a large bowl, and mix with the mint, cilantro, oregano, garlic, sherry, vinegar, and molasses. Season with cumin, allspice, red pepper flakes, salt, and black pepper, and mix well. Shape into 4 patties.
3Brush grill grate with oil. Grill burgers 5 minutes on each side, or until well done. Heat the pita pocket briefly on the grill. Serve burgers wrapped in pitas with feta cheese.