When the steaming broth is ladled into the bowl, the eye of round cooks and the onion and scallions lose their raw edge. The broth can be made up to one month ahead; remove the brisket and let the broth cool to room temperature before freezing. Wrap the brisket tightly in plastic, store it in a resealable freezer bag, and freeze it; thaw completely in the refrigerator before slicing.
Beef simmered with garlic and peppers in a thick tomato sauce makes for a warm and satisfying dinner. A slow cooker turns a less expensive cut of meat into a flavorful stew. Serve it in flour tortillas or spoon over rice.