Cut the peppers into very small cubes and set aside. Also cut the shallots and garlic into fine cubes and sweat in a little olive oil until translucent. Now add the pearl barley, season with salt and deglaze with the stock. Simmer for about 15 minutes on a low heat and then add the peppers and cream and cook for another 8 minutes. Finally add the finely grated parmesan and serve.
Put the pikeperch skin-side into the hot pan and press it down a little with a palette so that the skin lies nice and smooth on the bottom of the pan. When the skin is nice and crispy, add a little butter, garlic and rosemary and finish frying.