Cut pears into pieces, bring white wine (or pear juice) with sugar, vanilla sugar and cinnamon to a boil and steam pear pieces in it until soft, let cool and puree.
Whip the cream until stiff, fold the dissolved gelatine leaves into the pear puree and fold in the whipped cream.
Refrigerate for at least three hours, puree strawberries and season with powdered sugar.
Remove the pear mousse from the refrigerator and spread the strawberry sauce over it.
Serve the pear mousse with strawberry sauce.