Dissolve gelatin in hot water, set aside. Grind oreo biscuits and melted butter.
Press firmly into springfoam pan or casserole. Put in fridge to set for atleast 30 minutes. In a bowl beat cream cheese, castor sugar, vanilla and egg till smooth and creamy. In anoder bowl beat double cream or whip cream till peaks are formed.
Fold beaten cream in cheese cream mixture and add gelatine in it, fold in gently. Remove spring foam pan from fridge.