In a blender, combine the all-purpose flour, cornstarch, granulated sugar, eggs, coconut milk, water, melted butter, and yellow food coloring. Blend until completely smooth and lump-free.
Strain the batter through a fine-mesh sieve into a bowl and let it rest in the refrigerator for at least 30 minutes to stabilize the texture.
Heat a 7-inch non-stick skillet over low-medium heat. Do not grease the pan unless necessary. Pour a small amount of batter into the center and swirl to create a very thin, even crepe.
Cook for 60-90 seconds until the top is set and the edges start to lift. Do not flip; the pancake should only be cooked on one side and must remain yellow without browning.
Carefully slide the pancake onto a plate or parchment paper and let it cool completely. Repeat with the remaining batter.
In a chilled mixing bowl, whip the heavy cream, powdered sugar, and lime zest until stiff peaks form.
To assemble, place a cooled pancake on a flat surface with the cooked side facing up. Place a dollop of whipped cream in the center and top with a large mango slice.
Fold the sides of the pancake over the filling like a burrito to create a neat, rectangular pillow shape.
Place the pancakes seam-side down on a plate and refrigerate for at least 30 minutes to firm up before serving.
Serve chilled, optionally drizzled with passionfruit pulp for an extra tropical touch.