Peel the onion and finely dice it, and wash the wild garlic.
Heat the olive oil in a saucepan over medium heat and sauté the onion until translucent (the onion pieces should not brown).
Add the risotto rice, stir until each grain of rice is coated with oil, and roast for about 1 minute (the rice should not brown).
Deglaze with white wine, reduce the heat and simmer for approx. 1 minute.
Now add the vegetable stock to the rice, just enough to cover it with liquid. Stir frequently to prevent it from burning. Once the stock has been absorbed, add more stock to the pot, again just enough to cover the rice. Keep about 1/3 (about 2 cups if you are using 1.500 ml / 6.4 cups) of the broth on the side for the next step.
Blend the wild garlic with the 1/3 stock using a mini blender or hand blender. Add the mixture when the rest of the stock has been used up. Simmer for a little longer.
Remove the pot from the heat, stir in cold butter, salt, and yeast flakes.
Before serving, stir in the lemon juice and, if using an organic lemon, finely grate some of the zest over the top. Serve hot.