Slice 'N' Bake Lemon Cookies

2 1/4 cups flour
1/4 teaspoon baking soda
1/2 cup butter or margarine -- softened
1/2 cup shortening
1/2 cup sugar
1/2 cup packed light brown sugar
1 egg
3 tablespoons lemon juice, bottled
egg white -- beaten
slice almonds
Stir together flour and baking soda; set aside. In large mixer bowl, beat butter, shortening and sugars until fluffy. Add egg; mix well.
Gradually add dry ingredients and lemon juice; mix well.
Chill 2 hours; form into two 10" rolls. Wrap well; freeze until firm.
Preheat oven to 350 degrees. Cut rolls into 1/4" slices; place 1" apart onto greased cookie sheets. Brush with egg white; top with almonds.
Bake 10-12 min. or until lightly browned.