I flew SWISS airlines from San Francisco, through Zurich to Stockholm; Lufthansa from Stockholm to Frankfurt and United from Frankfurt to San Francisco. I was quite pleased with pretty much every meal although I would have to say the Swiss meals left me a bit hungry afterwards as they were mainly fruit, veggies and plain chicken breast. I think the Swiss meals were actually considered the "absolutely no allergen meals" as they appeared to be gluten, dairy, soy and egg free.
Here is a summary (with photos) on what I was served:
flight 1 - SWISS - San Francisco to Zurich
This 10 1/2 hour flight served 2 meals. Dinner was
- spinach salad with fat free lemon vinegrette