Line an 8x8-inch tin with baking paper.
Break the biscuits into medium-sized chunks then add them to a large bowl along with the mini marshmallows and crushed meringue nests.
Melt 500g of white chocolate then stir in the lemon extract.
Pour the melted chocolate into the bowl and mix well until everything is evenly coated. Transfer it to your lined tin and press it into place.
Melt the white chocolate for the topping and spread it over the top of the rocky road.
Add blobs of the lemon curd on top of the chocolate then use a toothpick to swirl them together.
Decorate with jelly lemon slices, more marshmallows, meringue pieces and biscuit crumbs.
Refrigerate for 4 hours then cut into squares and enjoy!