I think the very best meal service you would get on OS88 (17:45 - 8:40) to VIE and onward with LH7203 (10:55 - 12:20) to FRA. OS is using Do&Co (doing worldwide event catering for example in Formula 1 Paddock Clubs) as their catering company and they offer exeptional food even in Y. Service in OS is also generally better (at least in my opinion

).
The downside of course is the 2 hour layover in Vienna ...
Greetings from Vienna
cma410