JESS: What’s the white stuff?
LUKE: I think it’s cheese – or cream.
JESS: And the green stuff?
LUKE: I think it’s … best picked off.
This is another “mirroring” scene for Jess and Luke, showing them side by side, dressed alike, and gazing at their soup with the same expression of confusion and distrust. It doesn’t make a lot of sense though. Luke runs a successful diner – surely he can tell the difference between cream cheese and cream? And why is he so horrified by fresh herbs? (I think it’s sage, but I’m not sure).
Luke is always telling Lorelai and Rory off for eating meat and junk food, advocating a healthy plant-based diet. It’s nonsensical that he would be unable to identify a herb and unwilling to eat it, or look disgusted by a bowl of butternut squash soup. I mean, if he hates meat, and he hates vegetarian food, what exactly does Luke eat?