Ensure you have 2 metal bowls.
Pour the oat milk into a saucepan on high heat.
Add the zest and juice of the orange, bring to a boil, then reduce to a simmer for 2–3 minutes.
If you don't like oranges, simply leave out the zest and juice and replace them with your favourite tea bag, such as mint or berry.
Chop the chocolate into small pieces.
Sieve the infused milk into a measuring jug, ensuring you have exactly 150 ml.
Add the boiling hot infused milk to the chocolate and whisk until it is all dissolved, creating a chocolate milk.
Place ice into the second metal bowl and set the bowl with the chocolate mixture on top of the ice bath.
Whisk for 3–5 minutes until it starts to thicken and become a wonderful chocolate mousse.
Serve with vegan cream and some sliced chocolate on top!