CRUST: Beat flour, butter, sugar and salt in large mixer bowl until crumbly. (or pulse in food processor). Press into greased 13x9 pan. Bake at 350 for 12 to 15 minutes or until golden brown.
FILLING: Whisk together eggs, corn syrup, and amaretto. In separate bowl, whisk together sugar, cornstarch, and salt until no lumps remain. Whisk melted butter into sugar/cornstarch mixture. Whisk both mixtures together, stir in almonds. Pour over hot crust; spread evenly. Bake for 25 to 30 minutes or until center is set.
Opt: Spread chocolate chips evenly over hot bars, return to oven for 2 minutes to soften. Carefully spread melted chips. Cool in pan on wire rack.