Minty that's fine and dandy but your menu would be way over most people's budgets.
Up until last year we ate pretty much 80% organic(until the dc began to bleed us dry financially). We're now into the 5th year on one salary so it's just not possible anymore.
However we all eat very well. I try to buy organic meat and milk wherever poss( but have recently bought Lidl chicken and Aldi sausages and the veg box has gone -so shoot me) but this is increasingly rare. We eat veggie most of the time instread and I'm a pretty fine imaginative cook myself which helps.
Regards parties I'm afraid my kids come first. As I mentioned before after paying for venue hire and other bits and bobs(we don't have entertainers and do very nice tasteful party bags for £2 a head)the food has to be on a budget.
I do it very tastefully and often homemade and to a theme eg dinosaurs,fairies etc. However as my kids very rarely get to eat chipolatas,coloured products etc I always include a lot of those too,it is their day after all and is what they want.
I keep to the budget and will find cheaper mini sausage rolls etc to suit them and my purse. That way I don't get into debt over a party and they're happy. Also we may be able to afford some nice organic sausages to eat at home the following week
What I'm trying to say is your menu is very impressive and
if I had the money and a nanny to look after the 3 dc whilst I was concocting it all I'd do similar but the fact is I haven't.
It's all down to money,the mums whose parties you're turning your nose up at are probably also trying to keep to a budget just because you don't have to doesn't mean they should be condemned.