In a mixing bowl, combine the almond flour, oat flour, maple syrup or honey, vanilla extract, and softened coconut oil for the crust. Mix well until the ingredients are fully combined and form a dough-like consistency.
Press the dough evenly into the bottom and sides of a baking pan, creating a crust. Make sure the thickness is consistent.
Bake the crust in the preheated to 350°F (175°C) oven for about 8-10 minutes or until it turns golden brown. Once baked, remove it from the oven and let it cool completely.
In a saucepan, combine the coconut cream, fresh lemon juice, lemon zest, maple syrup (or honey), coconut oil, Agar-Agar, and cornstarch for the lemon cream filling. Whisk the mixture until the ingredients are well combined. Place the saucepan over medium heat and bring the mixture to a gentle boil, stirring constantly. Allow it to simmer for a few minutes until it thickens and becomes smooth.
Remove the saucepan from heat and let the lemon cream filling cool slightly. Then, pour it into the cooled tart crust, spreading it evenly. Refrigerate the tart for at least 2-3 hours, or until the lemon cream filling sets and becomes firm.
Once the tart is fully chilled and set, you can serve it as is or garnish it with additional lemon zest, coconut flakes, or fresh berries. Enjoy!