Suppose you had a Star Trek replicator that had some extra obvious features, like being able to interpolate between any existing items (e.g. "halfway between a strawberry and a blueberry").
What mashups of food or drink would you try first?
Explain more... do you mean, just something exactly intermediate between octopus and ice cream in every respect? Or like, octopus with the flavor of ice cream, or texture of ice cream inside?