Frozen collards (or substitute frozen spinach) are an easy way to get greens into a frittata. For zing, drizzle frittata wedges with hot sauce or barbecue sauce.
1. Preheat oven to 400°F.
2. Heat oil in ovenproof 10- to 12-inch skillet over medium-high heat. Add onion, and sauté 5 minutes, or until translucent. Push onion to one side of pan, and add collard greens. Cook 5 minutes, then stir together greens and onions.
3. Stir eggs into collard mixture. Cook 5 to 7 minutes, or until edges are set. Sprinkle with Parmesan cheese.
4. Transfer skillet to oven, and bake 10 minutes, or until egg mixture is completely set. Cut into 6 wedges.