Begin by chopping the vegetables and chicken. You'll need 1 cup diced carrots, 1 cup diced celery, 1 cup chopped onions, and 1 lb beef stew meat (or chicken thighs). This ensures everything is ready for cooking.
In a large pot, heat 2 tbsp olive oil over medium heat. Add the chopped onions, carrots, and celery. Sauté for about 5-7 minutes until the vegetables are tender, stirring occasionally. Next, add in 2 cloves minced garlic and sauté for another minute until fragrant.
Now, add the chicken pieces to the pot. Cook for 5-7 minutes until the chicken is browned on all sides. This step helps in developing the flavors of the broth.
Stir in the 1 can of diced tomatoes (with juices), 1 cup corn, and ½ cup pearl barley. Pour in 4 cups chicken broth and 2 cups water. Add 1 tsp dried thyme, 1 tsp dried rosemary, ½ tsp salt, and ¼ tsp black pepper. Mix everything well to combine the flavors.
Bring the mixture to a boil, then reduce the heat to low and cover the pot. Allow it to simmer for about 1 hour, or until the chicken is cooked through and tender, and the barley has absorbed much of the liquid and softened.
After an hour, check the seasoning and adjust any salt or pepper as needed. Ladle the soup into bowls and serve warm, savoring the delightful aroma and flavors!