Cook the pasta according to package instructions in salted water until al dente.
Chop onion and zucchini. Fry in olive oil until golden. Blend with mascarpone, parmesan, salt and pepper until creamy. Season and set aside.
Put approx. 1/2 cup pasta water aside. Add the pasta water to the pesto and drain the pasta. Stir the pesto into the pasta and serve with some more grated parmesan and pepper.
Tipps
You can also use othergreen veggies for this pesto – e. g. brokkoli or spinach.