In a large bowl mix together the lemon pie filling and angel food cake mix. Use a spoon or spatula to mix this together and don't over mix or whip.
Spray a 9 x 13 pan with non-stick spray or grease with shortening. Add the batter to the pan and spread out evenly.
Place in the oven on the center rack. Bake for 25 minutes or until top starts to brown.
Place on a cooling rack and cool for 1-2 hours before cutting into squares.
A can of undrained crushed pineppple works great too or even key lime pie filling if you can find it.These bars can be cut into smaller pieces if you have a bigger crowd to feed.Nutritional values are approximate. Please use your own calculations if you require a special diet.