In a large bowl, separate the egg whites and beat the eggs with an electric beater until they start to become white and firm. Then add the cream of tartar and salt. Continue to beat while slowly adding the sugar roughly 50ml at a time. Lastly, add the vanilla essence.
Fill a piping bag with a Wilton #30 tip or similar. Make a solid circle base with the mixture, add a dollop of the jam mix in the middle as shown then form the rest of the ghost's body shape by circling the strawberry jam centring each ghost on top of the jam. Refill the bag until all the mixture has been used.
Bake in the oven for an hour. Then turn the oven off and leave to crisp in the oven for roughly a further hours.
Once the meringues have cooled down slightly position the chocolate crispies to form the eyes of each ghost. You can use a bit of icing sugar and water mixed into a thick paste for glue if the meringues have cooled too much.