Preheat oven to 375 F degrees. Grease a tart pan with cooking spray.

Heat a skillet over medium high heat and add olive oil to it. Add the leeks and saute until leeks are soft and getting slightly caramelized. Add the turkey bacon, and season with salt and pepper. Saute a bit more until bacon is slightly browned. Let cool.

In a bowl whisk the eggs well, then add buttermilk and cornstarch, whisk well. Add shredded cheese to eggs and mix. Add leeks and bacon to egg mixture and mix.

Pour egg mixture into the tart pan and bake for about 35 to 40 minutes or until golden brown.

Serve with veggies on the side.