Apple Bars
["2 c. flour", "1 tsp. salt", "2/3 c. shortening", "1/2 c. milk", "1 egg yolk (save the white)"]
["Mix well and roll out half to fit 8 x 12-inch pan.", "Crust comes only part way up the sides."]
["flour", "salt", "shortening", "milk", "egg yolk"]