for the vegan lemon layer:
- 1 1/3 cups white sugar.
- 6 tablespoons cornstarch.
- 1 1/3 cup plant-based milk (such as oat or soy)
- 1/2 cup lemon juice.
- 1/4 teaspoon turmeric (optional for colour)
- 1 teaspoon vanilla extract.
- 1 - 2 tablespoons powdered sugar (optional for dusting)