Chicken Soup with vegetables

1 tablespoon vegetable oil 1 onion , chopped 1 stalk celery , chopped 1 carrot , chopped 2 tablespoons flour 2 cups chicken stock or 2 cups chicken broth 2[...]

2 tablespoons canola oil 1 onion , chopped 3 carrots , chopped 2 stalks celery , diced 1 red pepper, diced 1 tablespoon fresh thyme , chopped salt and pepper[...]