Set up your blender and add a generous amount of EVOO to it.
Add a clove of garlic and blend together.
Add pistachios and blend thoroughly until you start to get a creamy consistency.
Wash the basil and pat it dry using kitchen paper or a tea towel. Add two handfuls of basil to the blender and chop it into the mix by using the pulse option (or turning it on and off in quick spurts.
Once the first round of basil is mostly mixed in, add 3 tablespoons of pecorino romano and a few pinches of salt, then the rest of the basil.
Continue to pulse until most of the basil is mixed. If any is left, add some more EVOO, push down the basil leaves using a spatula and blend again until it is thick and creamy.
Pour the pesto out of the blender into a bowl, and you have a beautiful bowl of green happiness.
Grab a fresh loaf of bread or a hot plate of pasta and go heavy on the pesto!