This parsnip and fennel soup is a comforting and flavorful dish that is perfect for chilly days. The combination of sweet parsnips and aromatic fennel creates a rich and creamy soup with a hint of licorice flavor. The soup is made by sautéing onions, parsnips, and fennel until they are soft and fragrant, then simmering them in vegetable broth until tender. Finally, the soup is pureed until smooth and garnished with fresh fennel fronds. Serve this soup as a starter or a light meal with crusty bread.