Slow Cooker Tomato Basil Parmesan Soup ***Omigosh. This soup is...in a word...divine. My husband took a few bites and said, "Wow...this is restaurant soup!" It's smooth and creamy goodness. Definitely puree the onions, carrots, celery and tomatoes in the food processor so it's not too chunky. So yummy. This is one of the best things I've ever made. Love it!