Heat oven to 375°F. In small bowl, mix melted butter and garlic powder; set aside.
If using crescent rolls: On lightly floured surface, unroll dough; press into 12x8-inch rectangle, firmly press perforations to seal. If using dough sheet: On lightly floured surface, unroll dough; press into 12x8-inch rectangle.
Cut into 2-inch squares; place on ungreased cookie sheet. Brush with butter mixture.
Bake 4 to 6 minutes or until puffed. Meanwhile, in medium bowl, mix egg and mayonnaise until well blended. Stir in crabmeat, cheese, tomato, onions and pepper sauce. Spoon generous tablespoon crab mixture on each square.
Bake 10 to 12 minutes longer or until golden brown and tops are set. Serve warm.