Step-by-Step Instructions

Step 1: Prepare the Bread Layer

1. 1. Choose Your Bread: Use day-old or slightly stale bread for the best texture. If using fresh bread, cube it and let it sit out for 1–2 hours to dry slightly.

1. 1. Cube the Bread: Cut the bread into 1-inch cubes. You’ll need about 6–8 cups.

1. 1. Butter the Dish: Grease a 9x13-inch baking dish with butter or cooking spray.

1. 1. Layer the Bread: Spread the bread cubes evenly in the prepared dish.

Step 2: Make the Egg Custard

1. 1. Whisk the Eggs: In a large bowl, whisk together 6 large eggs until smooth.

1. 1. Add Milk and Seasonings: Pour in 2 cups of whole milk or cream. Add 1 tablespoon of Dijon mustard (if using), 1 teaspoon of salt, ½ teaspoon of black pepper, and any optional spices (e.g., garlic powder or nutmeg). Whisk until well combined.

Step 3: Assemble the Casserole

1. 1. Add the Ham: Sprinkle 1 ½ cups of diced ham evenly over the bread cubes.

1. 1. Layer the Cheese: Add 1 ½ cups of shredded cheese on top of the ham.

1. 1. Pour the Custard: Slowly pour the egg mixture over the layers, making sure all the bread is soaked. Use a spatula to press down gently, ensuring the bread absorbs the custard.

1. 1. Top with Green Onions: Sprinkle ¼ cup of sliced green onions over the top.

1. 1. Add Extra Cheese: Finish with the remaining ½ cup of shredded cheese.

Step 4: Refrigerate Overnight

1. 1. Cover and Chill: Cover the dish tightly with aluminum foil or plastic wrap.

1. 1. Refrigerate: Let the casserole rest in the fridge for at least 6–8 hours (or overnight). This step is crucial for the bread to fully absorb the custard.

Step 5: Bake the Casserole

1. 1. Preheat the Oven: When ready to bake, preheat your oven to 375°F (190°C).

1. 1. Let It Rest: Remove the casserole from the fridge and let it sit at room temperature for 15–20 minutes.

1. 1. Bake Covered: Bake the casserole, covered with foil, for 30 minutes.

1. 1. Uncover and Finish Baking: Remove the foil and bake for an additional 15–20 minutes, or until the top is golden brown and the center is set.

1. 1. Rest Before Serving: Let the casserole cool for 5–10 minutes before slicing and serving.