Asian girls are incredibly sensitive about the shape and size of their nose. If a white man mentions their thick, meaty asian noses it will crush the completely. Why shouldn't they be shown a mirror to it?
Nonchalantly bring up the shape of her nose in conversation. Go further by demonstrating this on yourself by distorting your nose to resemble hers.
Tell her you saw a news report about the asians getting rhinoplasties; ask if she is planning on getting an 'asian alarplasty' to cure her racial birth deformity.
Say the words 'pig' and 'snout' out loud so she hears you. Make some 'oink-oink' noises then go back to drinking your soda or eating your salad like nothing happened. Leave her with a sense of racial inadequacy and shame.
She will feel so embarrassed that she will never again dare to speak with a white human being with normal features and a anatomically correct nose.