Sausage Minestrone

Name: Sausage Minestrone
Ingredients: 2 T. extra-virgin olive oil; 1 large onion, diced; 2 carrots, diced; 2 ribs of celery, diced; 1 lb sweet Italian sausage; ¼ tsp. ground thyme; ¼ tsp. ground sage; ¾ tsp. kosher salt; ½ tsp. freshly-ground pepper; 2 cloves garlic, minced; 1 (28-oz) can crushed tomatoes; 8 cups chicken stock; 1 (16-oz) can navy beans, drained & rinsed; 1 (15.5-oz) can cannellini beans, drained & rinsed; 1 bay leaf; ½ cup chopped fresh parsley; 8 oz. ditalini pasta; ¼ cup chopped fresh basil (plus more for serving, if desired)