Creating this delicious Eggs Benedict Casserole can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Grease a large casserole dish.
2. Toast English Muffins: Split the English muffins in half, toast them lightly, and arrange them in the greased casserole dish.
3. Prepare Egg Mixture: In a large bowl, whisk together the eggs, milk, heavy cream, salt, pepper, and Dijon mustard until well combined.
4. Add Ingredients: Layer the chopped Canadian bacon or ham over the toasted English muffins, followed by the shredded cheddar cheese.
5. Combine Layers: Pour the egg mixture evenly over the layers in the casserole dish, ensuring everything is well coated.
6. Add Chives: Sprinkle chopped chives on top if using, for a fresh touch.
7. Bake: Place the casserole in the preheated oven and bake for 45-50 minutes, or until the egg is set and the top is lightly golden.
8. Cool: Allow the casserole to cool for 10-15 minutes before serving.
9. Add Hollandaise: Drizzle or spoon hollandaise sauce over individual servings just before serving.

These steps will guide you in creating an incredible Eggs Benedict Casserole that is sure to delight your family and friends.