This isn't barley, it's pasta. You could also use orzatta. You can also dry the dough and grate it with a box grater. Barley and kasha used to be the staples of Eastern Europe; potatoes and pasta replaced them.
Put the flour in a mixing bowl, and make a well in the center. Mix in the rest of the ingredients to form a soft dough. Knead until elastic. Form into a disk and wrap with plastic. Refrigerate for 1 hour to relax.