Preheat the oven to 375°F/190°C/Gas 5. Spray an 8x8-inch baking dish with non-stick cooking spray. Set it aside.
Place a large skillet (or frying pan) over medium heat and add the sausage. Cook for 3–4 minutes until lightly browned, breaking it apart with a wooden spoon.
Add the onion and potato. Season with salt and pepper. Cook for 6–7 minutes, stirring occasionally, until the onion softens and the potatoes turn golden.
In a small bowl, whisk the eggs and milk. Season with salt and pepper. Stir in ½ cup of the shredded cheddar cheese.
Transfer the sausage and potato mixture into the prepared baking dish. Stir in the broccoli, then spread into an even layer.
Pour the egg mixture evenly over the top, then sprinkle with the remaining cheese.
Bake for 30–35 minutes, or until the eggs are set and potatoes are tender.
Remove from oven and let cool for a few minutes. Top with fresh chives before slicing. Serve and enjoy!
Notes
Tips
Use pre-shredded frozen hash browns instead of fresh potatoes for a shortcut.
Swap broccoli for spinach, peppers, or mushrooms to add variety to the flavors.
Try mozzarella, Monterey Jack, or Red Leicester cheese instead of cheddar.
Substitutions
Use chicken or turkey sausage for a lighter option.
Oat milk can be used as a substitute for dairy milk if needed.
Not sure about sausage or potato varieties? Refer to the sections above for alternatives.
Leftovers
Store cooled leftovers in the fridge for up to 3 days. Reheat in the oven or microwave until warmed through.
Freezing
This casserole can be frozen after baking. Cool completely, wrap tightly, and freeze for up to 2 months. Thaw overnight in the fridge and reheat before serving.
You can also freeze the casserole before baking. Assemble as directed, wrap tightly, and freeze for up to 2 months. Thaw overnight in the fridge, then bake as directed, adding 10–15 minutes to the cooking time.
Always consult the Food Standards Agency in your country for the most up-to-date advice on storing and freezing foods: Food Safety (USA) | Food Standards Agency (UK)