For the grilled fennel, wash the fennel bulbs and cut into thin slices. Finely chop the fennel greens and set aside.
In a bowl, mix olive oil with a little lemon juice and salt. Roll the fennel slices in the marinade. Place the marinated fennel slices in a grill tray on the grill grate or place them directly on the grill grate right away. Cook until soft and arrange the grilled fennel with the finely chopped fennel greens.