Lemon Chicken Orzo Soup

4 teaspoons olive oil 8 ounces boneless skinless chicken breast halves , cut into small chunks salt (to taste) 1 medium onion , diced (about 1 1/2 c.) 2[...]

9 cups chicken stock 2 teaspoons olive oil 1 1/3 cups carrots , chopped 1 1/3 cups onions , chopped 1 cup celery , chopped 1 garlic clove , minced 1 teaspoon[...]