Put the biscuits in a freezer bag and crumble with the cake roll. Chop 100 g chocolate coating and melt in a bowl over a warm water bath. Knead couverture, jam, biscuit and rum. Form about 30 small balls with wet hands and chill for about 1 hour.
Coarsely chop 250 g of chocolate coating and melt in a bowl over a warm water bath. Pull the chocolates through the couverture with the help of a fork, let them drip off a little and place them on a cake rack. Chill the pralines for about 1 hour. Before serving, decorate with pink sugar and possibly a slice of edelweiss
2 hours waiting time