I can actually see 3 different ingredients.
That doesn't matter;
It does matter from culinary point of view.
"Oh? Are you some kind of crazy culinary nabob now? Look, Urist, if you want variety, you got it right here:
- these plump helmets have been boiled until green
- these have been split to toothpick-like splinters on the chopping block
- these have been smacked with a wooden mallet for half an hour (you can't see it, of course, because they're too tough to dent, but we really did)
- and these have been sat on by the cat.
So don't go complaining about lack of variety or insufficiently prepared food. This food is prepared in many varied and exciting ways. The question is if you are prepared for this food."
(P.S. if the last sentence doesn't work, sorry. I don't english very good.)
(you jokes pretty well, I wouldn't worry about it)
How long do you have to boil a plump helmet before it goes green?
Difficult to answer.
Dwarves dont use pots, even though large cauldrons are in the game as tools-- Dwarves never use them. The methods used by dwarves to "boil" never seem to be elaborated on, as kitchens do not incorporate pots. They do not incorporate knives. They do not even consume fuel.
Dwarves use some mysterious and mystical form of food preparation that has no direct real-world analogue.
HOWEVER---
If you DID choose to actually boil a plump helmet, and you wanted to know how long it would take before it turned green, this would depend upon a number of factors.
1) What is the pot you are boiling it in made from? Is it made from iron? Is it made from copper or brass? Perhaps it is made of aluminium? The metal used to make the pot has a significant impact on the time needed to achieve a color difference in the helmet.
2) What is the pH of the water used to do the boiling? Alkaline? Acid? Neutral?
3) How saline / how many ionic molecules per cc, etc-- is the water? Is it deionized? Does it have many dissolved minerals? If so, which minerals?
4) Do plump helmets contain any organic compounds that change color under thermal or ion concentration changes? (EG, does it contain something like anthocyanin,
like that found in red cabbage?)
Too many unanswered questions to properly answer.
However, it is entirely possible (should certain above conditions be met) for purple plump helmets to turn livid green upon boiling. The degree of green-ness and the time required to reach same would be dependent upon which of the above conditions where met, and in which combinations.