In recipe but not consumed - nutritional values?

Suppose I slice some big chunks of ginger and put them in a soup.  I'm not going to eat them, of course, but can I safely assume that the nutrients (and calories), minus the fiber have fully leaked into the soup?

no, since you simmering the ginger in soup, a liquid based substance, only water soluble nutrients will leak out into the soup. so only vitamins C and the B vitamins will be in the soup. as for calories i'm pretty sure that not all of them will be in there, fat certain proteins and certain carbohydrates are also not water soluble, but since ginger is so low in calories anyway you could probably assume they all were and it wouldn't affect the soup that much.