Begin by coating a 9x13-inch baking dish with non-stick spray to ensure easy release once baked.

In the prepared baking dish, evenly distribute half of the diced Canadian bacon across the bottom. Next, layer half of the English muffin pieces on top of the bacon, ensuring even coverage.

In a large mixing bowl, whisk together the eggs, whole milk, onion powder, salt, garlic powder, and black pepper until fully combined.

Carefully pour the prepared egg mixture over the layered bacon and English muffins in the baking dish.

Cover the baking dish tightly with plastic wrap and refrigerate for at least 2 hours, or overnight if you prefer.

When you’re ready to bake, preheat your oven to 375°F (190°C).

Remove the plastic wrap from the baking dish and sprinkle paprika evenly over the top. Place the dish in the preheated oven and bake for 35 to 40 minutes.

Once baked, allow the casserole to sit for a few minutes to ensure easy slicing. Drizzle generously with warm hollandaise sauce and garnish with freshly chopped parsley.