Preheat the oven to 350°F (175°C). In a mixing bowl, combine almond flour, melted coconut oil, maple syrup, and salt. Mix until a dough forms.
Press the dough evenly into the bottom and up the sides of a 9-inch tart pan. Prick the bottom with a fork to prevent bubbling.
Bake the crust for 10-12 minutes or until lightly golden. Remove from the oven and let it cool completely.
In a blender, combine soaked cashews, coconut milk, maple syrup, vanilla extract, and lemon juice. Blend until smooth and creamy.
Pour the cashew cream into the cooled tart crust and spread it evenly. Refrigerate for at least 2 hours to set.
Once set, arrange the sliced kiwis on top of the tart. Garnish with fresh mint leaves if desired.
Slice and serve chilled.