How do you make a dish suitable for the fairy queen?
When she asks if you are rich?
You need to show her you have 100,000 monies on you (She doesn't actually take it, though).
She will then tell you that you can go to the basement and start rebuilding the tower, but the feature isn't actually implemented yet.
Unless you meant what you need to do to take her on a date. Still haven't figured that one out.