Preheat the oven to 200 degrees Celsius or bring water to a boil in a pot.
If making the sweet potatoes in the oven fork them all around making small holes to prevent the potato from exploding in the oven. Bake in the oven for about 40-50 minutes, until the sweet potato is soft and fully cooked through.
Or cook/steam the sweet potato in the pot. For a quicker cooking time you can divide the sweet potatoes into smaller pieces. If you steam or cook the sweet potato it will take about 20-35 minutes, depending on the size and if you have cut it into smaller pieces.
When the sweet potato is done let it cool for a few minutes before removing the peel.
When you have removed the peal place the sweet potato in a bowl and mix using a hand mixer until smooth.
Add cacao powder, sugar, liquid sweetener and cinnamon (if using) and mix or stir until combined.
Add plant based milk to thin the sweet potato chocolate mousse until it has desired consistancy. Let the mousse cool down completely.
Place in two glasses/bowls and top with blueberries and roasted chickpeas (or any other desired topping).