Brush lamb chops with oil and season on both sides with salt and pepper and the herbes de Provence, pressing the herbs to adhere. Grill for 2 to 3 minutes per side or until slightly charred and cooked to medium-rare doneness. Serve 2 chops per person topped with some of the Tapenade Butter. Garnish with fresh oregano, if desired.
Place butter, anchovies, garlic, zest, and pepper flakes in a food processor and process until smooth. Add the olives, salt, and pepper and pulse until well combined. Scrape the mixture into a bowl, cover with plastic wrap, and refrigerate for at least 1 hour before serving, if desired. Remove the butter from the refrigerator 10 minutes before serving to soften slightly.