Step 1

In a large pot, heat olive oil over medium-high heat. Add the beef cubes and brown them on all sides, about 5-7 minutes.

Step 2

Add the chopped onion, carrots, celery, and minced garlic. Sauté for another 5 minutes, until the vegetables are softened.

Step 3

Pour in the beef broth and bring the mixture to a boil. Stir in the pearl barley, dried thyme, and bay leaf.

Step 4

Reduce the heat to low, cover the pot, and let it simmer for about 1 hour, or until the barley is tender.

Step 5

Season with salt and pepper to taste. Stir in the chopped spinach or kale and cook until it wilts.

Step 6

Remove the bay leaf before serving. Garnish with fresh parsley.