First pre heat the oven to 350F. Then spray bottom only of 13x9 inch pan with cooking spray. Then in a large bowl stir cookie base ingredients until soft dough forms. Then press dough in bottom of pan. Bake 15 minutes.
Next in medium bowl stir walnuts, granulated sugar, 1/4 cup butter, 1 teaspoon cinnamon & the salt with fork until mixture is well mixed and crumbly. Sprinkle nut mixture evenly over partially baked base. Then with your hands crumble frozen fillo shells evenly over nut mixture. Then bake for about 18 to 20 mins longer or until golden brown.
Next in small microwavable bowl microwave 1/3 cup honey, 2 tablespoons butter, the brown sugar, lemon juice & 1/4 teaspoon cinnamon uncovered on High 1 minute or until bubbly. Stir in vanilla. Then drizzle honey mixture evenly over fillo. let cool completely for about 2 hours.
Then cut into 6 rows by 4 rows. Then before serving drizzle 1/2 teaspoon honey over each bar. Store covered at room temperature.