So, we proceed to the preparation of the basis of our side dish – pearl barley. Pour half a glass of pearl barley with two and a half glasses of water and put on fire. Bring to a boil and cook for 45 minutes. No soaking. When cooked, drain the excess water, add a little butter and leave to infuse. I cook pearl barley in advance so that I can quickly prepare our side dish. So let’s get started. Fry the onion in vegetable oil.