Tortellini with beans

2 teaspoons vegetable oil 4 carrots , chopped 1 onion , chopped 2 garlic cloves , minced 1 teaspoon dried basil 1 bay leaf 4 cups chicken stock 1 (28 ounce)[...]

1 tablespoon vegetable oil 2 carrots , sliced 1 onion , chopped 1 stalk celery , sliced 2 cloves garlic , minced 1 tablespoon chopped fresh basil (or 1 tsp.[...]