For the Savory Custard:

• 12 large eggs (or 8 jumbo eggs)
• 2 cups milk
• 1 cup heavy cream
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1 tsp dry mustard
• 1 large pinch cayenne pepper

For the Bundt Cake Layers:

• 1 heaping cup ham, diced into 3/4-inch cubes
• 2 cups spinach, chopped
• 1/2 tsp salt (divided)
• 1/4 tsp black pepper
• 1/4 tsp garlic powder or minced garlic
• 1 large pinch cayenne
• 2 cups shredded hash browns, frozen
• 8 cups bread, diced into 3/4-inch cubes
• 1/4 cup green onions, chopped
• 2 cups shredded cheese, divided