Kahuku is where the North Shore stops being about waves and starts being about lunch. The town sits at the northeastern corner of Oʻahu, past Turtle Bay, and for roughly two miles along Kamehameha Highway it carries a string of trucks, shacks and roadside kitchens selling garlic shrimp on paper plates with two scoops of rice.
The reason they are here is agricultural rather than touristic. Kahuku was a sugar plantation town — the mill closed in the early 1970s, and the community that had grown around it had to find something else. Some of that land went into aquaculture, and the brackish ponds behind the highway grow shrimp and prawns commercially to this day. Several of the trucks are, quite literally, the retail end of a farm: Romy's raises prawns and shrimp on its own property, and Fumi's has long served shrimp from the ponds beside it. Giovanni's, the graffiti-covered truck that made the whole thing famous, started as a mobile operation in 1993 and settled at the old sugar mill site by the mid-nineties.
The mistake visitors make is treating this as a single destination. It is not one truck, it is a strip, and the options run well beyond shrimp: corn, huli-huli chicken, poke, kalua pig, shave ice, açaí, Thai and Filipino plates, and fruit stands. If you arrive at Giovanni's, see a queue of forty people and get back in the car, you have missed most of what is actually here.
The order of business is simple. Shell-on garlic is the classic, and it is messy — butter, garlic and shell, eaten with your hands, and the smell stays in a hire car for days. Spicy is genuinely spicy at some of the trucks. Several trade cash-first. And almost everything here closes far earlier than a visitor expects: this is a daytime strip, and by early evening much of it is shuttered.