Sausage and Lentil Soup

My very favorite sausage and lentil soup is at Carrabbas. At a time that I lived no where near a Carrabas, I searched high and low for a recipe that was even close to how delish their soup is. After many attempts, I finally came across this. It isn't the same but it is close! I loved this with the artisan bread below.

Sausage and Lentil soup
(This makes a ton, enough to serve about 10, I would guess)

1 lb. Italian sausage
1 large onion, chopped
1 stalk of celery, chopped
2 large carrots, chopped
1 small zucchini, chopped
6 cups chicken broth, we always add about 2 more
2-14.5 oz cans petite diced canned tomatoes, undrained
2 cloves garlic, minced
1 t salt
2 cups dry lentils, rinsed
black pepper, red pepper flakes, basil, oregano, parsley, and thyme to taste (dried or fresh)

Brown sausage, drain grease. Combine all the ingredients in a large pot and bring to a boil. Simmer for 1 hour or until lentils are tender. Add more chicken broth or water to desired consistency. Sprinkle with Parmesan cheese.