In a medium bowl, beat cream cheese and 1 tablespoon melted butter or margarine until smooth. Add the chicken, onion, salt, pepper, milk and pimento. Mix well.
Separate crescent dough into four rectangles. Firmly press perforations to seal. Spoon 1/2 cup of the chicken mixture onto the center of each rectangle. Pull 4 corners of dough to center of chicken mixture and twist firmly. Pinch edges to seal.
Place sandwiches on an ungreased cookie sheet. Brush tops of sandwiches with 1 tablespoon of melted butter or margarine; sprinkle with crushed croutons. Bake in preheated oven for 25 to 30 minutes or until golden brown.