Cook the gnocchi in salted water according to the instructions on the packet. Then drain and rinse with cold water.
Cut the zucchini and peppers into thin slices or cubes. After chopping, fry both ingredients together with the finely chopped onion in hot oil and season with salt and pepper.
For the tomato vinaigrette, mix together the garlic, vinegar, oil, tomato paste and stock. Season to taste with salt and pepper.
Mix the gnocchi, vegetables and the vinaigrette together. Sprinkle the basil and parmesan over the salad.
The salad can be served cold or lukewarm. Parma ham, antipasti and baguette go well with it.