"" Using a red onion for example adds zero "
it adds ' redness ' a natural pigment.
which might be Zero
or not. vegetable pigments are something to
consider. not so much , of course
the Green in unripened Bell Peppers
such as GBP's.
no onion ever broke anyones bank
that being said
i don't use a lot of onion
and keep the " Reds " in the refrigerator
after partial use.
I think they are not Amused
and become a bit Stong.
those I then use after a Fresh Cold Water bath
and it tames them
for me.