I always longed to be the kind of girl who could survive on a croissant and coffee a day – all inspired by Jean Rhys’s short stories detailing the waifishly chic existence of beautiful lost girls in Paris – but the reality is what you really need is a good sandwich, and one that is as healthy as it is filling. And while London is full of sandwich shops, how many cite sourdough and Russian rye as their bread options? And how many focus on offering just vegetarian and fish fillings? Replenishable fish that is locally sourced from low-impact fisheries in Kent i.e. not the over-fished Big Five (haddock, prawns, tuna, cod and salmon) and vegetables from British farms. Opened in August on Rivington Street in Shoreditch, the O-food pop-up had a proper launch last week (which I missed due to being a totally disorganised first-time mum) so this week O-food kindly sent some sandwiches my way. Well, I wolfed down the smoked mackerel & horse radish O’Macky sandwich in a matter of minutes, as did my hubby with The Hook, made from a hake & coley fish patty, sweetheart cabbage and capers. Lip smackingly delicious. Finished up with a super healthy mushroom, gherkin and beetroot salad and voila, sated and satisfied.

O-food, 54 Rivington Street, London, EC2A 3QN. 8am-4pm. Until September 23.