Blueberry Crumble Bars

     Aside from being delicious, blueberries are known for many things including healthy benefits. According to a study done in 2009, a diet that contains a rich amount of blueberries lowers blood cholesterol levels and improves insulin sensitivity thereby lowering the risk of diabetes and heart disease.
     Because they are packed with vitamin C, B complex, vitamin A, vitamin E, copper, selenium, iron, and zinc, the blueberry can boost your immune system and help prevent infection.
Blueberries also offer an anti-aging benefit.  They are chock full of anti oxidants primarily as a result of the pigment that makes them dark blue in color.
     In a University of Michigan cardiovascular study, it is suggested that eating blueberries can aid in reducing belly fat.  Berries that contain seeds, like blueberries, blackberries, strawberries, and raspberries are low on the glycemic index and will help control cravings in a healthy diet.

Ingredients...
Crust & Crumble Topping:

• 1/2 cup white sugar
• 1/2 cup Splenda (sugar substitute)
• 1 teaspoon baking powder
• 1 and 1/2 cups all-purpose flour
• 1 and 1/2 cups whole wheat flour
• 1 cup margarine (choose a healthy type or use butter)
• 1 egg
• 1/4 teaspoon salt

Filling:

• Juice and zest of one lemon 1/4 cup white sugar
• 1/3 cup Splenda sugar substitute
• 4 teaspoons cornstarch
• 4 cups fresh or frozen blueberries

Here's how you do it...

1. Preheat the oven to 375 degrees F (190 degrees C). 
2. Grease or line with parchment, a 9×13 inch baking pan.
3. In a large bowl, blend 1 cup sugar, 1 and 1/2 cups all purpose flour, 1 and 1/2 cups whole wheat flour, 1 teaspoon baking powder, salt, and lemon zest. 
4. Blend in the margarine (or butter) and  beaten egg using a fork or pastry cutter. The dough should be crumbly.
5. Put half of the crumble mixture into the prepared pan and pat it down with your fingers.The other half of the crumble is for the topping.
6. In a separate large bowl, using a fork, mix the lemon juice, 1/4 cup sugar, 1/4 cup Splenda, and 4 teaspoons cornstarch.
7. To this, add the blueberries and using a large spoon gently toss until coated.
8. Spread the coated blueberries evenly over the crust.
9. Sprinkle the remaining crumble mixture over the blueberries.
10. Bake in preheated oven for 45-55 minutes until the top starts to get golden.
11. Cool  on a rack before cutting into squares.