INGREDIENTS
•
4 cups beef stock or low-sodium broth
•
1 cup water
•
1/2 cup pearled barley
•
1 large thyme sprig
•
Salt and freshly ground pepper
•
2 tablespoons extra-virgin olive oil
•
1 pound mixed wild and cultivated mushrooms, stemmed and thinly sliced (or 3/4-pound presliced mushrooms)
•
1 large shallot, finely chopped
•
1/2 pound ground sirloin
•
1 large egg
•
2 tablespoons dry bread crumbs
•
2 tablespoons freshly grated Parmigiano-Reggiano
•
2 tablespoons chopped flat-leaf parsley
•
Sour cream, for serving (optional)