1. Preheat oven to 375°.
2. Cook spinach in microwave according to package directions; cool slightly. Place spinach in a clean kitchen towel. Squeeze dry.
3. Combine spinach and next 4 ingredients (through Monterey Jack cheese) in a large bowl; toss. Arrange bread mixture in a broiler-safe 11 x 7-inch glass or ceramic baking dish coated with cooking spray. Sprinkle Parmesan cheese over top.
4. Combine milk, Dijon, pepper, nutmeg, and eggs in a bowl, stirring with a whisk. Pour egg mixture evenly over bread mixture. Bake at 375° for 38 minutes or until set. Turn broiler to high (do not remove pan from oven). Broil 4 minutes or until edges are lightly browned