Mash or blend your beans with baking soda and wild garlic brine until you get a rough, sticky paste. It doesn’t need to be totally smooth.
Add salt to taste, and if you like, stir in chopped wild garlic for extra bite.
Press the mixture into a small tray lined with parchment. Smooth the top with a spatula.
Cover loosely with a clean cloth or lid — you want some airflow, not airtight.
Leave at room temperature for 24–36 hours (slightly warm spot preferred, ~24°C). You should see some firming, a light crust or drying at the top, and a tangy smell.