MR. GYROS GREEK RESTAURANT 3620 N. Causeway Blvd., Metairie, 833-9228 Gyro plates come with lemon-roasted potatoes, tzatziki sauce and pita bread. The lamb kebab features skewers of lamb and vegetables and is served with lemon-roasted potatoes, rice pilaf and pita bread. No reservations. Lunch and dinner daily. Credit cards. $$