Preheat oven to 365. Warm Olive Oil in a large saute pan over medium heat. Once Oil is hot, add the leeks and salt. Saute until tender. Lower the heat to medium add kale and black pepper. Cook covered for 5 minutes or until the kale is wilted, then allow it to cool.
Meanwhile Beat the eggs in a large mixing bowl.
Combine the Kale and Leeks to the Eggs.
Coat a muffin tin with nonstick cooking spray. Place about 1/4 to 1/3 cup of the egg mixture
into each muffin cup, bake just until the center of each fritatta sets and the edges are lightly golden, about 10 minutes.