Ingredients
Method
- Heat a skillet with oil, cook onion until soft.
- Add spinach and cook until wilted. Set aside to cool.
- Whisk eggs, egg whites, milk, salt, and pepper.
- Stir in shredded cheese, tomatoes, and spinach mixture.
- Pour into a greased 9×13 pan.
- Bake at 375°F (190°C) for 25–30 minutes until firm.
- Slice and toast muffins in the oven for 10 minutes.
- See full steps with tips & photos → https://theboatshedcafe.com/breakfast-sandwich/
Notes
- For meal prep, wrap sandwiches in foil and refrigerate up to 3 days, or freeze for up to 1 month.
- Reheat in the oven, toaster oven, or air fryer for best texture.
- Swap spinach for kale, or add cooked bacon or sausage for extra protein.
- Whole wheat English muffins make this more filling and nutritious.