Preheat oven to 350°F.
Prepare pudding as directed on box:
In a deep 2 quart casserole bowl place cookies and bananas mix well set this aside.
In a saucepan combine 3/4 cup of sugar, flour and salt; with whisk beat in milk until blended and smooth.
Bring to boil over medium low heat; cook 1 minute, stirring constantly. Remove from heat.
In another bowl beat egg and egg yolks, add 3 tablespoons of hot milk mixture.
Stir egg mixture into saucepan cook over low heat 2 minutes, stirring constantly until mixture is hot but Not Boiling.
Stir in butter until melted. Remove from heat; stir in 1 teaspoon vanilla extract. Pour mixture over cookies and bananas in casserole; set aside.
Prepare meringue topping: In large bowl with mixer on high speed, beat egg whites, sugar, lemon juice and vanilla extract until stiff peaks form.
Spoon mixture over top of pudding, making sure meringue touches sides of casserole all around.
Bake 15 minutes until top is golden.