Hi m0rq
The orange sack onions you describe are COMMON BROWN or storage onions
They will grow similar in Germany, whether English or Dutch, all are used across the board
in BIR kitchens.
Basically good all-rounder, medium to strong flavour and ideal for base gravy and Bagar
Do a simple search - Allium cepa or maybe Sturon
I was writing a recipe and each onion from a 5kg sack of these averaged out at 110g+ each.
So 10 to 20 to 30 onions will make any good home base gravy.
The much bigger Supermarket mild onions, (size of a orange) around 4 per-KG
work just as well m0rq, in any base gravy. Plus like you say less onions to peel.
6 years ago I posted a base gravy video recipe using these Supermarket onions
Link:https://youtu.be/5cG5n-hpHMALike they say, if its not broke, dont fix it...
The really big Spanish sweet and very mild, (size of a grapefruit)
which have a paper skin, not unlike a Garlic bulb are not used for base gravy in BIR.
Mainly too mild too sweet and too watery, usually rare and expensive in comparison.
Great for salads and onion rings or topping a burger bun.
cheers Chewytikka