Place silicone egg moulds into freezer.
Place Vitabite into a heatproof bowl. Melt by placing bowl over simmering boiling water, stirring occasionally or melt in the microwave on a low heat.
Remove silicone egg moulds from freezer.
Using a pastry brush, coat silicone egg moulds with a thick layer of melted Vitabite, then return to freezer for 5 minutes until set. Repeat this step. Keep a small amount of melted Vitabite to use later on.
Remove Vitabite from egg moulds and place Marshmallow Fluff into each egg half to just below top (do not fill to top as the filling will seep out when the two halves are sealed).
In each egg half, pipe 15g of yellow icing into centre of Marshmallow Fluff.
Using a pastry brush, seal two egg halves using remaining melted Vitabite.
Return to freezer for 5 minutes until set.
Vitabite is a food for special medical purposes and must be used under medical supervision.