Lemon Squares
["2 c. flour", "1/2 c. powdered sugar", "dash salt", "2 sticks margarine, softened"]
["Mix until soft ball, press into a 9 x 13 inch greased and floured pan (do not use glass).", "Be sure the crust is pressed very high on the sides of the pan.", "Bake in a 350\u00b0 oven for 20 minutes."]
["flour", "powdered sugar", "salt", "margarine"]