I cannot help noticing the wonderful looking food which gets loaded onto bizjets.
Where does it come from?
Are there specialised catering firms who make high quality stuff at a very short notice, perhaps from a menu?
In my (limited) experience, the FBO has some arrangement with a local supplier, perhaps a hotel or restaurant.
At my airfield, the cafe supplies the FBO, though the menu is very different. I think. I'm sure if a customer wanted something that the cafe could not supply, the FBO would source it elsewhere.
I have also seen aircrews nipping to the local supermarket to pick up supplies, and then moan that it was Tesco and not Waitrose. Ha ha. I'm guessing they were after finger food, sandwiches, sushi, crisps, etc.
I imagine that it would be difficult to make a viable business just making bizjet food - unless you are based somewhere with a huge amount of private jet traffic. Farnborough maybe. At a large airport, perhaps the usual catering suppliers (Gate Gourmet, LSG Sky Chefs, et al) are involved. It's probably not that different to a First Class meal.
Personal experience from short-ish flights... the best food I ever got on a bizjet was an Irish black-pudding sandwich (hot) on a flight departing from Cork. Mmm... delicious. Dublinpilot will know what I'm talking about.
Are there specialised catering firms who make high quality stuff at a very short notice, perhaps from a menu?
Yes, at least at airports with sufficient business traffic as Finners already wrote. Examples of companies that we regularly work with at frequent destinations: http://www.inflight-catering.de/englisch/ http://www.takecair.de/index2.html http://www.kuechenzauber.de/en/air-catering.html http://www.kempinski.com/en/munich/hotel-airport/dining-munich-airport/private-aviation-catering-service-EDDM/
At other destinations, it will be arranged by the handling agent if there is one or by the crew (take a taxi downtown and get something from a deli - which will only cost a fraction of what the air caterers charge for the same stuff). Prices for bizjet food vary considerably, from "almost normal" to 200+ Euros delivery fee alone in places like Barcelona and Madrid.
Peter would look great for this to be delivered to the TB20 on the ramp at Shoreham.
Ah but it depends on who makes the food 
In Barcelona that would come with a 325 Euro bill. 200 for the delivery, 100 for the "peeled and sliced executive tangerine" and 25 for the plate. But honestly it would come as a surprise there if they actually did peel and slice the fruit for that wee amount of money.
Is that an IV drip you are using in the plane? ;)
It's a more efficient way of delivering oxygen - in liquid form.
Actually that's an old pic, from the bad old days of the oxysaver cannulas - I now use the O2D2 regulators
Check the local caterers:
for EDDL and EDDK I can say that we have picked up boxed food from "Stockheim" - they also seem to cater to EDDG and I venture a guess that there are comparable outfits at the major airports. Your friendly handling agent can certainly help ;)
... for EDDL
At Düsseldorf we always get it from Claudia (would have to use Google for her second name - if she has one at all). Everybody there knows her and I think she has a small office in the GA terminal.
