Hands-On London Miso and Umami Koji Workshop in SE19

At 21 Harold Road in London SE19, a compact teaching kitchen transforms fermentable staples into deep, savory condiments during the London Miso and Umami Koji Workshop. Over four focused hours, host Yuki guides small groups (maximum 11) through hands-on techniques to make a 2 kg batch of London miso and four distinct koji condiments—shoyu, onion, tomato and lemon—then cooks a seasonal lunch from the results. This is not a passive demonstration. Participants touch steamed soybeans, measure koji, mash and salt miso, and learn safe, temperature-aware ways to manage fermentation. The key scene is an elongated prep table lined with bowls, cloth-covered crocks, and the faint sweet-earth scent of koji — Aspergillus oryzae — the filamentous fungus that converts rice or soy into a rich amino-acid base. That microorganism is the real star: it’s the biological ingredient behind shoyu, sake and centuries of Japanese preservation technique, and it gives the workshop a tactile, almost lab-like focus on microbiology and flavor. Yuki emphasizes practical recipes you can reuse at home: chilli miso for weeknight dinners, shoyu-koji for glazing, and lemon-koji pickles that brighten winter greens. The session closes with a communal lunch—miso soup, shoyu-koji mushroom rice, lemon-koji pickles, onion-koji tomato salad, and a choice of tomato-koji roasted chicken or tofu—where questions fly between bites. English and Japanese are supported, reflecting Yuki’s bilingual teaching style. What makes this offering special in South London is its marriage of disciplined technique and local seasonality: Yuki adapts koji applications to British produce, showing how London-grown vegetables and market fish respond to fermentation. Small group sizes and a clear safety briefing mean the class suits curious cooks, food professionals, and travelers looking for hands-on cultural exchange rather than a spectator tour. Practical notes: classes are four hours long, all bookings are non-refundable but can be rescheduled with 14 days’ notice, and vegetarian options are available if you specify allergies ahead of time. Bring curiosity, a notebook, and a willingness to get hands-on with knives and stoves. This workshop offers a concentrated, repeatable skill set—one you’ll return to on cold evenings when a spoonful of miso changes everything. Expect hands-on sanitation briefing, printed recipes, and a portion of the miso to take home; participants typically leave with clear instructions for ageing and storing their paste. The class’s small size creates quick feedback loops from Yuki, so even first-timers make usable batches and leave confident to experiment. Reserve at least ten minutes early to check in and bring a sealed container for your miso. Wear comfortable shoes, please.