Most recipes with fennel, like our Shaved Fennel, Roasted Tomato, and Pistachio Salad, focus on the crunchy bulb, leaving us in a lurch when it comes to the leftover stalks and fronds. Fennel tops are tasty too! For these greens not to go to waste, there are five ways — including making a fennel pesto and adding them to your juice — to use fennel stalks and lacy fronds. Here are some favorite ways to use them up.