Pacho’s Burger Truck is named after Asel “Pacho” Dehsabzi, who runs the patty-smashing joint with his sister Tabby. Parked near a Rozelle petrol station, the sound of sizzling patties competes with the hum of Victoria Road traffic.

Onions are smashed into most patties “so you get that nice onion pull when you bite into it.” It’s the key to the Oklahoma — the caramelised onion flavour so compelling they choose not to add sauce, lettuce or tomato at all.

Drawing on their Afghan heritage, the truck runs a monthly special: a kofta smash, born from a visit to their Lebanese butcher — shop fragrant with fresh herbs — finished with a lemony tahini spread and diced pickled turnips.

Everything, always, is 100% halal. Find them Wednesday to Sunday, smashing from five ’til the line runs dry.