Clean the zucchini well, peel them and slice them in thin slices. In a frying pan add the butter and the olive oil. When the butter is melted add the onion.
As soon as the onion is beginning to soften, add the zucchini to the skillet and with high heat for a couple of minutes. Lower the heat to medium-low and cook slowly. Add salt, pepper and keep warm.
Meanwhile cook the pasta according to the package directions. While the pasta is cooking, in a large bowl beat the two eggs, slightly salted them and add plenty of Parmesan Cheese.
When the pasta is al dente, drain and add to the egg mixture. Mix well and add the zucchini. Mix well again and serve immediately.
Giangi's Kitchen provides nutritional information, but these figures should be considered estimates, as a registered dietician does not calculate them.