For the mousse
For the tahini chocolate sauce
Put the first six mousse ingredients in the bowl of a stand mixer and, on a medium-high to high speed, whip to medium-soft peaks, which should take roughly two and a half to three minutes. (Alternatively, whisk by hand for five to 10 minutes, until the mix is the desired consistency.)
In a small bowl, whisk all the sauce ingredients until smooth.
Divide the mousse between six bowls, then drizzle over some of the chocolate sauce. Finish with a scattering of nuts and amaretti, and serve.
