1. Remove top and bottom of onion and thinly slice. Cut sausages into 1/4" thick pieces on a bias.
2. Heat a medium nonstick frying pan on the stove over medium/medium-high heat. Once hot, coat with cooking spray and add the onion and sausage. Cook until the onions have browned.
3. Add additional oil if needed to prevent sticking. Crack the 5 eggs into the pan. Use a cover or a separate pan turned upside down to cover the eggs. Cook until the egg whites have set. Season to taste with salt and black pepper.
4. Heat cooking oil in separate pan or in pan once eggs have been removed. Add kale and cook until tender (2-4 minutes). Season to taste with salt and black pepper.