Pasta E Fagioli (Soup) Recipe

1 Tbs olive oil
1 Lb spicy Italian sausage
2 Tbs Minced garlic
1 small yellow onion diced (3/4 cup)
3 carrots, peeled and chopped
2 stalks celery, washed and chopped
4 cups chicken stock (I used water and 2 tbs chicken base)
1 24 ounce bottle Ragu Hearty Traditional sauce
1 can kidney beans, drained and rinsed, 15 ounces
1 can Great Northern beans, drained and rinsed, 15 ounces
1½ cups ditalini pasta