Heat oil and crisp up the chorizo sausage. If not using, skip this step.
Add onions, carrots, peppers, garlic etc. and sweat for a few minutes.
Deglaze with a splash of wine, reduce (if you happen to be drinking some).
Add the tomato sauce (a bit of water if needed) and allow to simmer while the pasta finishes boiling.
Near the end, add a olives and a can of tuna just before the pasta is stirred in.
Last minute touches could be a handful of whatever dried herbs or fresh herbs you happened to see available. For me, it was a bunch of coriander, but anything goes.
The perk to this dish, is every ingredient is optional. Don't like tuna, don't use it. If you have chicken, slice thinly and use in place of chorizo. Versatility is key in camp cooking and who wants the same dish all the time.