Peel the chestnuts and boil them with 1/4 l water. Cover and cook for about 30 minutes until the water is almost absorbed. Add 200 ml milk, sugar, 1 packet of vanillin sugar, butter and 1 pinch of salt. Simmer for approx. 20 minutes until the milk is almost absorbed and the chestnuts have crumbled, stirring frequently. Finely puree the mixture while still hot. Stir in 6-7 tablespoons of milk. If necessary, pass through a fine sieve. Let the cream cool down
Whip cream and 1 sachet of vanilla sugar until stiff. Pour into a piping bag with star-shaped spout. Alternately squirt some cream onto the meringue and put the chestnut cream on top (if necessary press it through a potato ricer). Finish with a cream tuff
Melt the glaze in the bottle for about 10 minutes in boiling water. Decorate the tartlets with it. Leave to dry