Trim and blanch the fennel
10 minCut off and discard the woody ends of the fennel stems, then cut the fronds and tender stems into 3–4 cm pieces. Rinse them twice in plenty of water, add them to boiling water, and blanch for 5 minutes. Discard all the blanching water to remove the wild fennel’s bitterness. Press the fennel gently in a strainer to remove excess water.