Line the bottom of a springform pan (26 cm Ø) with baking paper. Crumble the bread finely and roast 2/3 of it without fat while turning. Add butter and melt. Remove from heat and stir in the remaining crumbs. Press the mixture into the mould as a base. Chill for about 30 minutes.
Onions clean, wash and cut into rings. Halve cucumbers lengthwise and cut into slices. Dice salami. Stir cheese until smooth. Fold in the prepared ingredients. Whip cream until stiff and let the cream firmer trickle in. Add to the cream cheese, season to taste
Spread the cream on the floor. Leave to cool for at least 4 hours. Garnish the cake to serve as desired