Chop 100 g of speculoosely. Separate eggs. Beat egg yolk and sugar with the whisk of the hand mixer until light and creamy. Beat 500 g cream and egg white separately until stiff. Fold cream and beaten egg white into the egg mixture.
Fold in the chopped speculoosity. Pour into a cold rinsed box form (approx. 25 cm long; 1.5 l capacity). Freeze for at least 6 hours.
Remove the ice. Finely crumble the remaining speculoos. Use an ice-cream scoop to cut off 8 balls and turn them over in the crumbs. (Refreeze remaining ice). Freeze the scoops again for about 30 minutes.
Chop dark chocolate. Heat 5-7 tablespoons of cream. Melt chocolate in it. Keep warm. Peel oranges including the white skin. Remove the fillets between the parting skins. Arrange 2 ice dumplings each with chocolate sauce, orange and physalis.