Lentil Barley Soup

Name: Lentil Barley Soup
Ingredients: 1 tablespoon canola oil; 1 medium onion (finely chopped); 2 garlic cloves (minced); 1 large carrot (peeled and finely chopped); 1 large celery stalk (finely chopped); 1 teaspoon dried thyme; 1/4 teaspoon kosher salt and freshly ground pepper; 1 1/2 cups water; 1 carton vegetable broth ((approximately 950 ml)); 1 cup dried red lentils; 1/2 cup uncooked pot barley; 1 28 oz can of diced tomatoes; 1/4 cup finely chopped fresh parsley; grated parmesan cheese (for serving)