If you need reminding that we live in a Mediterranean climate, notice all the olive trees that grow in the Central Valley. The UC Davis campus is so replete with them that they started their own olive oil production. Two other local oil options are Bariani and Maltese, which makes a Sicilian-style olive oil. Both can be found at area farmers markets and you'll learn a lot by talking to the sellers. Taste-test two varieties or styles side-by-side and note acidity versus buttery-ness. Save extra-virgin oil for cold preps like drizzling on salads and finishing grilled food. Otherwise, you dull all that fresh, olive-y flavor.