Mix until crumbly. Reserve 1 cup. Pat remaining mixture evenly into a 13X9 ungreased pan. Bake in a preheated 350 degree oven for exactly 15 minutes. Meanwhile do
Beat 1 eight ounce package of softened cream cheese with 1/3 cup of sugar. Add 1 egg and 1/3 cup of lemon juice. Beat until light and fluffy. Spread over hot baked crumb mixture. Sprinkle remaining crumbly mixture over the top. Bake 15 minutes longer. Do NOT overbake. Chill and cut into squares.