Grease 6 (9cm, 3.5-inch) tartlet pans with coconut oil, then line the bottoms with parchment paper and set aside.
Add dates, 3.5oz|100g almonds, and pistachios to mixing bowl and chop for 10 seconds / speed 10.
Add coconut oil and remaining 2.75oz|80g almonds to mixing bowl and chop for 5 seconds / speed 10.
Place 2 tablespoons of the nut mixture into the base of each tartlet pan and press evenly over the bottom and up the sides.
Set tartlet pans on a large sheet pan and freeze while you make the custard.
Wash and dry the mixing bowl.
In a small bowl stir to combine raspberry powder and boiling water. Strain through a fine-mesh sieve to remove any seeds.
In a medium bowl stir to combine matcha and 2 tablespoons of the lemon juice.
Add coconut milk, maple syrup, and vanilla paste to mixing bowl and heat for 8 minutes / 212°F|100°C / speed 2.
In a small bowl stir to combine cornstarch, water, and remaining 1 tablespoon lemon juice.
Add cornstarch slurry to mixing bowl and heat for 3 minutes / 212°F|100°C / speed 2.
Add half of the custard to the matcha mixture and stir well to combine.
Add reserved raspberry mixture to mixing bowl and mix for 5 seconds / speed 4.
Pour both custards into each tartlet shell and use a skewer to swirl the colors (see Tip).
Refrigerate tartlets until set. (about 2 hours)
Enjoy your dessert!