Quorn products. Quorn is a myco-protein produced by fermentation of a fungus (Fusarium graminearum), which is used as a meat alternative in vegetarian diets. Quorn is the brand name of Marlow Foods Limited, who developed this novel foodstuff. By flavouring and shaping Quorn, products such as chicken" fillets (lower left), "meat" pate (far left) and "ham" slices (upper centre) can be produced."