Sift flour and confectioners' sugar into a mixing bowl. Add milk, eggs, butter, vanilla, and salt; beat until smooth. Heat a lightly greased 6-in. skillet; add about 3 tablespoons batter, spreading to almost cover bottom of skillet. Cook until lightly browned; turn and brown the other side. Remove to a wire rack. Repeat with remaining batter (makes 10-12 pancakes), greasing skillet as needed.
For filling, melt butter in a large skillet. Stir in brown sugar, cinnamon, and nutmeg. Stir in cream and cook until slightly thickened. Add half of the bananas at a time to skillet; heat for 2-3 minutes, spooning sauce over them. Remove from the heat. Roll a pancake around each banana half and place on a serving platter. Spoon sauce over pancakes. Top with whipped cream and a dash of cinnamon, if desired.