Sauté peppers and onions in a small amount of oil. Add cilantro and parsley, season with salt and pepper. Cook until tender. Set aside.
In a medium bowl, combine the eggs and milk, whisk together well, and set aside.
Heat a nonstick skillet over medium heat. Spray with cooking spray. Ladle ¼ of the beaten egg mixture into the pan. Stir in the sautéed pepper and onion. Cook until set. Flip the omelette and cook until done. Add the sliced avocado and top with cheese. Fold the omelette and turn it out onto a warm serving plate. Top with additional cheese and garnish with fresh sprigs of cilantro.
Repeat this process 3 times to create four servings.
Notes
If you're counting WW Points, you might want to use a reduced-fat Mexican cheese blend instead of the Manchego. That would reduce the overall point count.