Place cast iron pan on medium heat. Heat enough butter, ghee, coconut oil or olive to generously cover the bottom of the pan. When hot, add shallots and sweet potatoes. Cook, stirring frequently for about 12 minutes, till sweet potatoes are soft and shallots are browned. Turn heat up to med/high and add zucchini. Cook for five minutes stirring frequently, till zucchini browns. Sprinkle with salt and pepper. Serve with poached eggs and garnish with chives.