saucepan; add eggs and milk, mixing well. Cook over low heat, stirring constantly, 25 minutes or until thickened. Remove from heat, and stir in vanilla.
Spread about 1/2 teaspoon peanut butter between 2 vanilla wafers forming a sandwich; repeat procedure with remaining peanut butter and vanilla wafers. Layer one-third of peanut butter-wafer sandwiches in bottom of a 3-quart bowl; top with one-third of custard over bananas. Repeat layers twice. Cover and chill. Spread with whipped topping; sprinkle with peanuts. Yield 8 to 10 Servings.