Ham and Gruyere Bread Pudding

I found this online, and it sounds like a twist on breakfast casserole.

• Ready In: 1 hr 35 mins
• Serves: 4-6

Ingredients

• 4  large  egg whites
• 4  large eggs
• 1  cup milk
• 2  tablespoons Dijon mustard
• 1⁄4 teaspoon fresh ground pepper
• 1  teaspoon fresh rosemary, minced
• 4  cups  bread, cut into 1-inch cubes
• 5  cups spinach, chopped and wilted
• 1⁄2 cup  roasted red pepper, chopped
• 1  cup ham, diced
• 3⁄4 cup gruyere cheese, shredded

Directions

1. Preheat oven to 375 degrees F. Coat 2-quart casserole with cooking spray.
2. To prepare custard: Whisk egg whites, eggs and milk in a medium bowl. Add mustard, pepper and rosemary: whisk to combine.
3. Toss bread, spinach, roasted red peppers and ham in a large bowl. Add the custard and toss well to coat. Transfer to the prepared baking dish and push down to compact. Cover with foil.
4. Bake until the custard has set, about 40 to 45 minutes. Uncover, sprinkle with cheese and continue baking until the pudding is puffed and golden on top, 15 to 20 minutes more. Transfer to a wire rack and cool for 15 to 20 minutes before serving.