1. Preheat grill or broiler.
2. Grill steak for 15 minutes or until desired tenderness.
3. Let stand for 5 minutes and thinly slice.
4. Meanwhile, combine cream cheese, scallions, horseradish,TABASCO® Chipotle Sauce, garlic powder and salt in medium sized bowl; stir to mix well.
5. To serve, spoon some cream cheese mixture onto each bread round. Top with sliced steak. Garnish with scallions.