Cut the spring onions into fine rings and dice the remaining vegetables. Halve the tomatoes.
Lightly sweat the spring onions in the oil and then briefly brown the peppers and zucchini and deglaze with the canned tomatoes. Simmer. Season with salt, pepper, a pinch of sugar and the herbs and let it boil down.
If you like it spicier, you can add some chili powder.