In a large bowl, combine the flour, brown sugar and salt.
Cut in the butter until mixture resembles coarse crumbs.
Pat into a 13-in.x 9-in.x 2-in. baking pan coated with cooking spray.
Bake at 350 degree for 18-22 minutes or until edges are lightly browned.
Meanwhile, in a large bowl, whisk the egg whites, sugar and almond filling until blended.
Stir in almonds.
Pour over crust.
Bake for 20-25 minutes or until set.
Cool completely on a wire rack.
Drizzle with the chocolate.
Cut into bars.
Store in an airtight container in the refrigerator.