In a large saucepan, melt 2 oz chocolate and butter over low heat, stirring constantly. Spread or brush over the bottom and up the sides of the pie crust. Chill.
Meanwhile, in a large mixing bowl, beat the cream cheese, sour cream,sugar and vanilla until smooth. Spread over chocolate layer; cover and chill for two hours.
Arrange strawberries over the filling. For great presentation, cut off the tops and place the cut end down into the cream cheese mixture and have the little ends poking up. Go around the pie in a circle until it is filled in with strawberries. Brush the strawberries with the melted jam. Then melt the remaining chocolate and drizzle it over the strawberries.