Mom made the best pesto. Even after I left home, I asked for it every single time I visited her. It just was not a real visit home if I didn't get a plateful of Mom's pasta with pesto. She marveled that something "so simple" could make me so happy.
Here's the website if you'd like to read more: http://www.italiannotebook.com/food-wine/pasta-al-pesto-genoese/. While you're there, sign up for the newsletter. It offers so much about the Italian lifestyle and culture that we haven't necessarily experienced here in the States.