Step 1

Preheat oven to 375°. Whisk together first 3 ingredients in a small bowl. Whisk together sugar mixture, milk, and 4 egg yolks in a medium-size heavy saucepan until well blended. Cook over medium heat, stirring constantly, 6 to 8 minutes or until thickened. Remove from heat; stir in butter and vanilla.

Step 2

Layer half of vanilla wafers in an 8-inch square baking dish. Top with half of banana slices and half of pudding. Repeat procedure with remaining wafers, banana slices, and pudding.

Step 3

Beat egg whites at high speed with an electric mixer until foamy. Gradually add 3 Tbsp. sugar, beating until sugar dissolves and stiff peaks form. Spread meringue over pudding, sealing to edge of dish.

Step 4

Bake at 375° for 7 to 10 minutes or until golden. Let cool 30 minutes, and serve warm; or chill an additional hour, and serve cold.