Home-Style Pot Pie

Ingredients 3 cup all-purpose flour 1 teaspoon salt 1 cup vegetable shortening 2 eggs, lightly beaten and divided 1/4 cup plus 2 tablespoons cold water 1 tablespoon white vinegar 1/2 cup chopped onion 2 tablespoons margarine, melted 3 cups diced cooked chicken breast 1 1/4 cups canned ready-to-serve chicken broth 1 cup chopped celery 1