2 tablespoons olive oil
1 pound fully cooked hot Italian sausage, cut into 1/2-inch cubes
1 large onion, chopped (about 3 cups)
2 large carrots, peeled, chopped (about 1 3/4 cups)
2 large parsnips, peeled, chopped (about 1 3/4 cups)
2 large celery stalks, chopped about 1 cup
21/2 teaspoons dried Italian seasoning blend
1 pound brown lentils (about 2 1/3 cups)
3 quarts (or more) low-salt chicken broth