Oh, plenty of things! There's different vegetables you can choose from, like tomatos, carrots, leeks, green beans, peas, and potatos, or even including various spices like parsley, oregano, or cilantro that could be used for added flavor when blended together, which makes for a soup that tastes delicious, not to mention being good for one's health!

[Really, he could go on all day about different soups you could make.]