01 -
Grease a 9x13-inch (23x33 cm) baking dish with cooking spray or butter.
02 -
In a large bowl, whisk together the milk, eggs, green onions, onion powder, and salt until well combined.
03 -
Spread half of the diced Canadian bacon into the prepared dish, then layer the diced English muffins on top. Add the remaining Canadian bacon, then pour the egg mixture evenly over the entire dish.
04 -
Cover the dish with plastic wrap or cling film and refrigerate for at least 8 hours or overnight.
05 -
When ready to bake, preheat your oven to 375°F / 190°C.
06 -
Remove the plastic wrap and sprinkle the top of the casserole with paprika. Cover the dish with aluminum foil and bake for 30 minutes. Remove the foil and continue baking for an additional 15 minutes, or until the eggs are fully set.
07 -
While the casserole bakes, whisk the milk and Hollandaise sauce mix in a saucepan over medium heat. Add the butter and cook, stirring frequently, until the mixture begins to boil. Reduce the heat to medium-low and simmer for about 1 minute, stirring constantly, until thickened.
08 -
Slice the casserole into 10 pieces. Place each piece on a plate and drizzle with the warm Hollandaise sauce before serving.