Meanwhile, in small saucepan, melt butter over medium heat. Stir in flour with whisk; cook 1 to 2 minutes, stirring constantly, until mixture is bubbly. Gradually stir in milk; cook 3 to 5 minutes, stirring constantly with whisk, until sauce is thickened and smooth. Remove from heat. Stir in paprika. Season with salt and pepper. Stir in chopped hard-cooked eggs.