Add the wine to deglaze the pan while continuing to stir the vegetables and rice. When the liquid begins to evaporate, start adding in the stock, 2-3 ladles at a time. You'll want to keep the rice mixture at a light bubble and stir it constantly. Stirring it will release the starches in the rice and thicken the soup. Every time it looks like the liquid is nearly absorbed, add a couple more ladles of stock, about every 4-5 minutes. Finish by adding in the remaining liquid. It will take 18-20 minutes for the rice to be done.