This is an honesty question. I’m looking for “yes,” but people who are trying too hard to feed me a line of nonsense answer “no.” The best way to answer is to say “Yes, in much the same way that you’re interviewing other people. We’re both trying to find the best fit for what we need and what we want.” If your answer is truly no, then say so – “No, I’m actually happy with my current position, but there were a few compelling aspects of this job that made me want to follow up on it” and list those aspects.