I believe it is all beef and panko filler, I am sure if you call they can tell you if they mix any pork into it. Yes, only during lunch. It comes in a hot-pot like container with the demi-glace sauce and a sunny side egg.

Wakasan on Westwood Blvd has it for lunch. It is delicious!! We have not gone in a while so their lunch menu may have changed.

Chantilly in Lomita!!
So far the best my wife and I have found. They import their chestnuts from Japan.
A little expensive and small but true to the size you would find in Japan.
Enjoy!

Pâtisserie Chantilly
2383 Lomita Boulevard
Lomita, CA 90717-1446
(310) 257-9454

http://www.patisseriechantilly.com