COMBINE crushed cookies, almonds, sugar and butter in medium bowl; mix well. Press firmly onto bottom and 2 inches up side of ungreased 9-inch springform pan.
MICROWAVE morsels in medium, uncovered, microwave-safe bowl on MEDIUM-HIGH (70%) power for 1 minute; STIR. The morsels may retain some of their original shape. If necessary, microwave at additional 10 to 15-second intervals, stirring just until morsels are melted. Sprinkle gelatin over milk in small saucepan; let stand for 1 minute. Warm, stirring constantly, over low heat until gelatin is dissolved; remove from heat.
BEAT cream cheese, sour cream and melted chocolate in large mixer bowl until fluffy. Beat in gelatin mixture and almond extract; fold in whipped cream. Pour into crust. Chill for about 3 hours or until firm. Run knife around edge of cheesecake; remove side of springform pan. Garnish as desired.