Hash Brown Bacon Breakfast Casserole

Ingredients

• 1 tablespoon olive oil
• 1 large onion, finely chopped
• 2 garlic cloves, minced
• 1 (10 ounce) package frozen chopped spinach, thawed and squeezed dry
• 1/4 teaspoon salt
• 1/4 teaspoon pepper
• 2 ounces sliced bacon, finely diced
• 3 cups frozen shredded hash brown potatoes, thawed
• 8 eggs
• 2 cups milk
• 1 cup shredded Fontina cheese
• 1 cup shredded Cheddar cheese
• 1 tablespoon Worcestershire sauce
• 1 teaspoon ground mustard
• 1/4 teaspoon ground nutmeg