Cook the pasta in salted water according to the instructions on the packet.
Halve the zucchini and cut into slices. Dice the peppers. Dice the onions and garlic.
Heat the oil in a pan. Steam the onions in it until translucent, add the remaining vegetables and steam for about 10 minutes. Then add the chopped garlic and the chopped herbs.
Add the tuna to the vegetables and sauté briefly. Then add the pureed tomatoes and simmer over a low heat for 20 minutes. Season with salt and pepper.