Adapted from a Bobby Flay recipe
1/2 cup packed freshly-grated parmesan cheese
10 fresh basil leaves
3 cloves garlic
½ of a supermarket-size bunch fresh parsley
Salt, several generous pinches
1/2 cup extra-virgin olive oil
Put everything except the oil into a blender or food processor. While pulsing, add about 1/2 cup olive oil streaming in through the top, and pulse until smooth-ish. Taste to see if you think it needs a little bit more of anything, and adjust as needed.