Preheat grill or broiler.
Grill steak for 15 minutes or until desired tenderness. Let stand for 5 minutes and thinly slice.
Meanwhile, combine cream cheese, scallions, horseradish, TABASCO® Chipotle Sauce, garlic powder and salt in medium sized bowl; stir to mix well.
To serve, spoon some cream cheese mixture onto each bread round. Top with sliced steak. Garnish with scallions.
Makes 6 servings.