For the Posset:
Step 1
Bring the cream and sugar to the boil in a thick-bottomed pan.
Step 2
Add the juice and zest of the lemons. Infuse for 5 minutes.
Step 3
Pass through a fine sieve into a jug, and then divide between the glasses.
Step 4
Refrigerate until set.
Step 5
Top with raspberries and a dusting of icing sugar.
For the Biscuits:
Step 6
Cream the butter and both sugars. The beat in the eggs one at a time.
Step 7
Sift the flour, bicarbonate of soda and salt and fold int the batter.
Step 8
Add the stem ginger and mix well.
Step 9
Divide into marble-sized pieces and press flat onto a lined baking tray.
Step 10
Bake at 175°C for 10-15 minutes.
Step 11
Cool and dust with icing sugar before serving with the posset.