Rich Butterflies

Preparation:

Preparation: Peel and wash the onion, celery and carrots, cut them into cubes, mince them and let them dry in a spoonful of oil. Add the diced courgettes, salt and cook over medium heat for about 15 minutes, stirring occasionally, adding a few spoonfuls of water when necessary. Boil the pasta in abundant salted boiling water, drain it al dente and add it to the sauce with one or two tablespoons of grated parmesan. Flavor with a few finely chopped walnut kernels before serving.