Place the shaved fennel in a resealable ziplock bag or bowl.
Thoroughly whisk together the Gremolata Olive Oil, lemon juice, salt, pepper, and chopped flat leaf parsley. Pour over the fennel and toss to coat. Marinate in the refrigerator for two hours.
In a bowl or large platter, arrange a bed of washed mixed baby greens. Arrange the fennel over the greens, pouring any remaining dressing over the fennel and greens. Sprinkle evenly with shaved Pecorino and pepper.