*You can use fresh diced onion if you want. Won't affect the taste![br][br]**You definitely don't want to add cold cream cheese to this. If you didn't set it out to bring it up to room temperature before putting the ingredients in the slow cooker, just unwrap the block of cheese, place it in the microwave on a plate, and heat for about 30 seconds or until it's just a little bit warm. If you add it to the ingredients when it's cold, it won't melt correctly - it'll form little lumps in the soup.