Drizzle oil in nonstick skillet over medium-high heat. Add onion and cook until translucent (about 5 minutes). Add spinach and stir for about 3 minutes, until spinach is dry. Set aside. Preheat oven to 375 degrees. Lightly coat a 9" nonstick pie pan with olive oil cooking spray. Sprinkle grated cheese in the bottom of the pan. Top with spinach mixture. In a medium bowl, whisk egg whites, whole egg, cottage cheese, red pepper, sea salt, nutmeg and black pepper. Pour egg mixture over spinach. Bake for 40-45 minutes or until set. Let sit for 5 minutes and slice into wedges.