Creating Easy Ham and Swiss Cheese Casserole is straightforward if you follow these simple steps:

1. Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish.
2. Combine the ham and cheese: In a large bowl, mix the diced ham and shredded Swiss cheese until well combined.
3. Prepare the egg mixture: In another bowl, whisk together the heavy cream, milk, eggs, Dijon mustard, garlic powder, onion powder, salt, and black pepper until smooth.
4. Layer the ingredients: Spread half of the cubed bread evenly in the prepared baking dish. Top with half of the ham and cheese mixture. Repeat with the remaining bread and ham and cheese.
5. Pour the egg mixture: Carefully pour the egg mixture over the layered bread and ham and cheese, ensuring even coverage.
6. Press down gently: Using a spatula, press down on the layers to help the bread absorb the mixture.
7. Bake: Cover the dish with aluminum foil and bake for 25 minutes. Then remove the foil and bake for an additional 15-20 minutes or until the top is golden brown and set.
8. Cool slightly: Remove the casserole from the oven and let it cool for 5-10 minutes before serving.
9. Garnish: If desired, sprinkle fresh parsley over the top for a pop of color.

These steps will guide you in creating this incredible casserole effortlessly.