The search function is two tiered.

The basic doesn't really work very well for several words, so you have to go under the advanced search function when under the main forum for that particular airline or subject. ie Cathay Pacific or Trip Reports.

When you do an Advance search, you put in the words: caviar, First Class under search by Key Word. Leave the Search by User Name blank.

Under Search in Forum, the forum you are in will have a tick next to it and is highlighted. The box below will say Also search in child forums. You have the option to untick that if you don't want to do a back search to several years!
You may also Ctrl+another forum if you want more topics. ie Trip Report.

But just typing those two words in alone, ie caviar, First Class will yield over 87 different threads on the topics.

You could have also looked at the CX First Menus which is a sticky at the top of the forum to give you an idea of what is being served.

I apologise if my response to the OP may have sounded harsh initially, but your question is one of many many repetitive questions we get over and over again, and it honestly would have been easier if people try to do a search first. Chances are that you will find what you're looking for in all our historical threads.