How to Make It
Place spinach and 1 Tbsp. water in a large microwave-safe bowl. Cover with plastic wrap. Microwave at HIGH for 1 minute and let stand, covered, until spinach is wilted. Drain well and chop.
Lightly grease a 6-qt. slow cooker with cooking spray. Layer half of bread and all spinach, broccoli, and chives in slow cooker. Sprinkle with Parmesan cheese. Top with remaining bread cubes, pressing down gently to fit.
Whisk together evaporated milk and next 5 ingredients until frothy. Pour evenly over bread. Top with shredded cheese. Cover and cook on Low for 3 to 4 hours or until set. Remove lid, and cook 10 minutes.