I forgot to include these sentences:

1) I use the Internet to be kept up-dated (or to keep-up-to date) on the latest news (meaning to be informed on the ...)
2) is the spelling and word choice of the following food correct?
Saurkraut (without plural), some asparagus (without plural)/spinach, kaki (without plural) or persimmon , kiwi fruit (or kiwi/kiwis),
a pot of jogurt, a carton of milk,, half a dozen egg (do you say a carton of eggs) a bag of deep-frozen (?) peas,
a half-liter bottle of water (??)
a one-liter bottle ..., a can of..
3) can you say a potato and tomato salad, a turkey sandwich, a turkey steak, horse mincemeat, veal cutlet or Wiener Schnitzel, to coat a cutlet with (is it correct?) breadcrumbs
4) Can you say "the centrepiece of the meal is turkey (meaning the main part of the meal is ...??)

Thanks

1. Either phrasing works fine -- just delete any hyphens. They're not needed here.

2. Sauerkraut, asparagus, spinach, persimmon, kiwifruit -- only "persimmon" would have an added -s to make it plural. All others have no separate plural form.

yogurt - American spelling

carton of milk - yes

half a dozen eggs (a carton of eggs would mean a dozen or sometimes 18)

a bag of frozen peas (no need for "deep")

All others here and in #3 are correct.

4. Yes, that's fine.

3.