Unroll crescent rolls and separate into eight triangles. Cut apple into eight wedges. Place an apple wedge and two red-hots on each crescent triangle. Bring up corners of dough to center; pinch edges to seal. Place in a greased 8-in. square baking dish.
In a small bowl, combine the sugar, butter and vanilla; spoon over rolls. Slowly pour soda around the rolls (do not stir). Sprinkle with pumpkin pie spice. Bake, uncovered, at 350° for 25-30 minutes or until golden brown. Serve warm with ice cream if desired.