Butter a baking sheet. Fill a pastry bag fitted with a small plain tip with warm Pâte à Choux. Pipe out 2-inch lengths of the pâte à choux. They should look rather like strips of yellow toothpaste. Top each with a second strip of the pâte. Form 20 such miniature éclairs. Brush the tops of the éclairs with beaten egg. Bake according to the pâte à choux directions (Steps 4