Homemade pesto can be used in so many ways, that it’s good to have around, waiting to be added to chicken or toast or even a salad dressing. So make sure to make a large batch! Pesto freezes well, so it’s a good way to preserve your bumper crop of basil. I freeze it in ice cube trays, so it’s pre-measured for recipes.
The optional addition of parsley prevents the pesto from turning brown too quickly. Using pecans instead of the usual pine nuts adds a touch of sweetness to balance the saltiness. Feel free to use Parmesan rather than Pecorino Romano, if that's what you have on hand. the Pecorino has just a little sharper flavor.