That's quite alright, really it is. Any self taught cook has the potential to outshine a classically trained one!
Other than myself, but when you've gone through what I have... er; what I mean is!

[Clears his throat -]

Even if you believe your skills to be worse than they are, I wouldn't mind cooking with you in the kitchen. There may be techniques you know that I've yet to learn!
And besides - there's no need to sell yourself short just because you're speaking to someone with a higher level of skill!

[Arrogant? Sure. But that doesn't mean he's rude to those who share his passions!]