01 - 
                Grease a 9×13 inch (23×33 cm) baking dish thoroughly with butter or non-stick spray.
              
              
              
                02 - 
                In a large bowl, whisk together 2 cups milk, eggs, green onions, onion powder, and salt until smooth and well combined.
              
              
              
                03 - 
                Scatter half of the diced Canadian bacon evenly over the bottom of the prepared dish. Spread all diced English muffins on top, then layer with remaining Canadian bacon.
              
              
              
                04 - 
                Pour the egg mixture evenly over the layered ingredients in the baking dish. Sprinkle with paprika for color and flavor.
              
              
              
                05 - 
                Cover the dish tightly and refrigerate overnight to allow the custard to absorb into the bread.
              
              
              
                06 - 
                Preheat oven to 190°C (375°F). Bake the covered casserole for 30 minutes, then uncover and continue baking an additional 15 minutes or until golden and set in the center.
              
              
              
                07 - 
                While casserole bakes, combine 1 cup milk, Hollandaise sauce mix, and butter in a small saucepan. Whisk over medium heat, simmering until sauce thickens and becomes silky.
              
              
              
                08 - 
                Slice the baked casserole and drizzle each portion with warm Hollandaise sauce. Present immediately while hot.