Creating a delicious Beef Barley Soup is easy when you follow these simple steps:

1. Prepare the Ingredients: Gather all necessary ingredients and chop the vegetables.
2. Brown the Beef: In a large pot, heat vegetable oil over medium-high heat. Add cubes of beef and brown on all sides. Remove the meat and set it aside.
3. Sauté the Vegetables: In the same pot, add the onion, carrots, and celery. Sauté until softened, about 5-7 minutes.
4. Add Garlic: Stir in the minced garlic and cook for an additional minute until fragrant.
5. Combine Ingredients: Return the browned beef to the pot. Add rinsed barley, beef broth, bay leaf, and thyme. Stir well.
6. Season It: Bring the mixture to a boil. Season with salt and pepper to taste. Reduce heat and let it simmer.
7. Simmer: Cover and simmer for about 1 hour, stirring occasionally, until the beef and barley are tender.
8. Add Peas: If using, stir in frozen peas during the last 5 minutes of cooking.
9. Finish Up: Remove the bay leaf. Taste and adjust seasoning if necessary.
10. Serve: Ladle the hot soup into bowls and garnish with fresh parsley.

Following these steps will ensure your Beef Barley Soup is packed with flavor and nutrition, delivering satisfaction with every spoonful.