Step 1

Grease a 20cm x 30cm slice tin with butter.

Step 2

Use a food processor to crush the biscuits, this takes 2-3 batches (if you don't have a food processor, put the biscuits in a strong plastic bag and roll/smash/crunch with a rolling pin).

Step 3

Place crushed biscuits, coconut, lemon rind and condensed milk in a large bowl.

Step 4

Melt butter and add to other ingredients, mix well. Firmly press mixture into tray.

Step 5

To make icing, sift icing sugar into bowl and stir in butter. Add lemon juice one tablespoon at a time until icing is a smooth, spreadable consistency.

Step 6

Spread slice with icing, sprinkle with coconut, refrigerate until firm and then slice into squares or triangles. Store in the fridge.