HEAT oven to 350°F.
GREASE bottom and side of 1-qt. souffle dish or casserole with butter; sprinkle with 1 Tbsp. sugar.
BLEND eggs, cream cheese spread, remaining sugar, liqueur and chocolate in blender 30 sec. or until smooth. Blend on high speed 15 sec. Pour into souffle dish.
BAKE 40 to 45 min. or until puffed and lightly browned. Sprinkle with nuts; serve immediately.