Step 1

1 Pour the cream into a bowl and whip with a hand mixer until soft peaks form. Add the lemon zest and vanilla towards the end.

Step 2

2 Add berries and nuts to the whipped cream and stir thoroughly.

Step 3

3 Cover with plastic wrap and let sit in the refrigerator for 3 or more hours for a firm mousse. You can also enjoy the dessert immediately if you don't mind a less firm consistency.