Milk Street Facebook Community member Jennifer Heftler of Los Angeles, blends fresh fennel, zesty lemon and buttery pine nuts into pesto. She uses the tender parts of the stalks that she trims off a large fennel bulb, but you could also use the bulb itself. If your fennel bulb has fronds attached, add them, too. If not, or if there are only a few fronds, supplement with fresh tarragon or basil. To keep the flavors clean and bright, Heftler skips the cheese. Mix the pesto into a pound of cooked pasta along with some reserved pasta cooking water to help the sauce cling to the noodles, then drizzle with additional olive oil. Or spoon it onto fish or pork.