- In a large bowl, whisk together eggs, salt, and pepper. Add parmesan. Set aside.
- Turn the broiler on the highest setting.
- In a cast iron skillet, warm olive oil over medium heat. Add the pancetta and cook, stirring frequently until it crisps, 3 to 5 minutes.
- Add onion and cook until it softens, about 3 minutes.
- Add greens and thyme and cook for 1 minute more.
- Pour egg mixture into the skillet. Stir gently. Then cook, undisturbed, until eggs are almost set, about 5 minutes.
- Place skillet under the broiler (about 4 inches from heat) until eggs are cooked and top is browned.
- Remove from oven. Cool for a minute before serving.
Photo and recipe by Food52.