Preheat oven to 350℉/175/180℃
Spay pan with non stick spray
Crust
Combine shortening, sugar, and flour; blend. (we did it by hand)
Pat into a 9 × 13-inch baking pan and bake
Place in oven and 15–20 minutes, or until crust is golden brown
Filling
Beat eggs with sugar
Add flour, salt, lemon juice, and rind and blend thoroughly
Pour onto hot crust and bake 20 minutes
Remove from oven and sprinkle with confectioners’ sugar
Cut into squares