Prepare Fusilli pasta or your favorite one as recommended in the package.
Chop the peppers and onion in very small pieces, crush the garlic but don’t mix everything.
On a deep frying pan or wok (this one is better) pour the olive oil and put it over high heat. When it is hot, add in the onions and garlic, mix them until they get a golden and a bit transparent.
Now add the red and green peppers, the salt and black pepper. Mix for a little while, add the tomatoes (the chopped, the puree and the paste). Stir well all the ingredients for a couple of minutes. Turn the heat down to low and leave it to simmer for about 10-15 minutes.
After those 20 minutes are up, taste it and correct salt and pepper if needed. It’s better to be less salty because usually, the tuna is a bit salty.
If it’s good for you then for the last add the tuna, mix well and leave it for 5 to 10 more minutes the most.
Remove from heat and it's ready to serve.
Serve and enjoy!