Dad’s Mushroom And Barley Soup

Ingredients : 10 dried mushrooms 5 cups chicken broth divided 4 cups water 2 potatoes cubed 2 carrots chopped ¼ cup pearl barley or more to taste ground black pepper to taste 2 tablespoons vegetable oil 2 onions chopped 1 clove garlic minced or more to taste 1 tablespoon all-purpose...