This tasty soup is a delicious winter slow cooker recipe. Canned crushed tomatoes, canned diced tomatoes and diced onion are added to a slow cooker. Then thyme, oregano, basil, sugar, salt, pepper, vegetable broth, butter and half and half are stirred into the tomatoes and onion. Next the soup cooks in the slow cooker for six hours. An immersion blend is used to blend the soup until smooth and creamy. The finished soup is served with croutons and cheese.