In a heavy pot or Dutch oven over medium heat, add the oil and brown the beef.
When the meat is browned, add the carrots, celery and garlic and continue cooking for a few minutes.
Add the beef broth and bouillon cube and bring to a boil.
Reduce the heat to low and continue to simmer until the meat is soft; about an hour.
Add the barley and continue to cook on low another 30 - 35 minutes.
Add salt and pepper to taste.
Notes
Refrigerator: Portion the soup into individual or meal-sized servings using airtight containers or freezer bags, leaving space for expansion.Freezer: Store the cooled soup in tightly sealed freezer-safe containers, where it can be kept for up to three months.Thawing and Reheating: Thaw overnight in the refrigerator or use the microwave's defrost setting. Reheat gently on the stovetop, stirring occasionally, and add freshly cooked barley if it was frozen without.