Prep the Beef: Season the stewing beef with salt, pepper, and onion powder. On the stove top heat 1 tablespoon of olive oil in a large Dutch oven over medium-high heat. Once hot, add the beef in batches, browning on all sides. Remove the tender beef and set aside.
Sauté the Vegetables: In the same Dutch oven, add the remaining tablespoon of olive oil. Add the rest of the ingredients such as diced onions, minced garlic, frozen carrots, and frozen celery. Sauté for about 10 minutes or until the vegetables are slightly softened. Add the tomato paste and season with a bit of salt and pepper.
Deglaze: Add a splash of the beef bone broth to the pot to deglaze, scraping up any brown bits from the bottom of the pan with a wooden spoon.
Combine Ingredients: Return the tender chunks of beef to the pot. Add the Worcestershire sauce, dried thyme, bay leaves, and the rest of the beef bone broth. Stir to combine.
Cook the Soup: Bring the mixture to a boil, then reduce the heat to a simmer. Cover and let simmer for about 1 hour, or until the beef is tender.
Add Barley: After the beef is tender, add the barley to the pot. Continue to simmer, over medium-low heat, covered, for about 30-40 minutes, or until the barley is cooked and the soup has thickened. Check the seasoning and adjust with more salt and pepper if needed.
Serve: Once the barley is tender and the soup is hearty and thick, it's ready to serve with fresh thyme or microgreens! Ladle into bowls and enjoy hot paiired with a simple green salad.