Start by making the flavored butter. Place parsley, chive, garlic, olive oil, salt and pepper in a food processor (I like to use this small one), and pulse several times until herbs are well-combined and finely chopped. Add the butter and lemon juice, and process until well-combined. Scrape butter onto parchment paper, then roll into a tight log, twisting the ends to seal. Chill for 2 hours before serving.