In the work bowl of a food processor, place dates. Pulse until finely chopped. Add pecans, ground ginger, cinnamon, and salt; pulse on medium-low speed until a sticky dough begins to forms, with small pecan bits remaining. (Do not overprocess or the dough will become oily.) Press dough into the bottom of prepared pan.
Drain soaked cashews, and rinse with cold water. In the container of a blender, combine cashews, coconut milk, maple syrup, melted coconut oil, molasses, lemon zest and juice, vanilla, nutmeg, cloves, 1½ teaspoons ginger, 1 teaspoon cinnamon, and ¼ teaspoon salt; blend until mixture is silky smooth and creamy, 2 to 3 minutes. Taste and adjust seasonings, if desired.