The great thing about pesto is you throw all the ingredients in one bowl and then blend it in the food processor with some olive oil. Last night I made a spinach-basil pesto.... fresh spinach, basil from the garden, toasted pine nuts, romano cheese, garlic, salt, & pepper.
I warmed the pesto on the stove and lightened it up by adding a little milk. I wound up using it as part of a side dish. Craig thought it was a little weird, but I put it over macaroni.