Step 1

Combine the cream, milk, sugar and vanilla in a large sealable plastic bag. Press down on the bag to distribute the sugar.

Step 2

Half fill a 4L (16 cup) airtight plastic container with ice cubes. Sprinkle with half the salt. Place the sealed plastic bag on top of the ice. Cover with ice and remaining salt.

Step 3

Place the lid on the container. Shake, holding at each end, for 5 minutes or until well combined (see note).

Step 4

Remove the lid. The soft serve should have thickened but still be soft. Snip off 1 corner of the bag.

Step 5

Spoon some lemon curd into a piping bag fitted with a fluted nozzle. Squeeze some soft serve into the piping bag. Repeat, creating layers of lemon curd and soft serve until no soft serve remains.

Step 6

Pipe the soft serve mixture into small glasses. Place in the freezer for 10 minutes to firm slightly. Serve immediately.