It's a bizarre sight: rows of polished church pews, each dotted with neat piles of fruit or veg. Shoppers scoop heaps into baskets, trolleys, or crumpled plastic bags saved from previous trips to Tesco.

Real chefs aren't afraid of working with serious heat. "My mum tells me to turn it down when I cook at home," says Jun Tanaka above the crackle and sizzle of smoking goose fat.

Schools are clamouring for a visit from the teachers in a kitchen on wheels.