Make the coconut base: place all ingredients in a large bowl, mix until combined and sticky.
Spoon the mixture into prepared pan and press firmly with a spatula or a spoon. Transfer to the freezer and let it firm up as you prepare the sauce.
Make the raspberry sauce: place the raspberries in a small saucepan, add water, orange juice, orange zest, maple syrup and cook over medium heat for about 10-12 minutes.
Add chia seeds, vanilla bean paste and mix. Allow to cool.
Pour the sauce over the coconut base and refrigerate until set, about 2-3 hours.