Heat oven to 375°F. If using crescent rounds, remove from package, but do not separate rounds. If using crescent rolls, remove from package, but do not unroll. Using serrated knife, cut roll evenly into 16 rounds; carefully separate rounds. Place 1 round in bottom of each of 16 ungreased regular-size muffin cups. Bake 8 to 10 minutes or until golden brown.
Immediately press back of rounded teaspoon into center of each baked round to make indentation. Remove rounds from muffin cups to cooling rack; cool 10 minutes.
Meanwhile, in small bowl, mix cream cheese and lemon-pepper seasoning. In another small bowl, mix preserves, horseradish and mustard.
Spread 1 teaspoon cream cheese mixture into each round; top with 1/2 teaspoon preserves mixture. Divide beef evenly among rounds; top each with 1 rounded teaspoon preserves mixture. Sprinkle with parsley.