なにわ食いしん坊横丁
Hidden at the back of the Tempozan Marketplace next to Kaiyukan — a recreated Showa-era food alley with a dozen small eateries. The source's pick is Jimbei near the front, whose red tsukemen (cold dipping noodles) is the order to make. Natural lunch spot before or after the aquarium.
Jimbei's red tsukemen is the recommended order.