Heat the oil in a pan. Sauté the onions and garlic. Add the barley and sauté for approx. 1 min., stirring until translucent. Pour in the wine and reduce completely. Stirring frequently, add the bouillon a little at a time so that the barley is always just covered with liquid, simmer for approx. 30 mins.
Gradually add the spinach, allow to wilt, continue to simmer for approx. 5 mins. until the barley is al dente. Stir in the radish and cheese, season.