Steps:
- If you're planning to bake this immediately, preheat the oven to 350 degrees F. If you're prepping this the day before, no need to preheat now.
- In a skillet (or 4-quart braiser that you can put in the oven), heat the butter over medium heat. Add the onion and cook until softened, 5 to 7 minutes.
- Combine the sourdough, mozzarella, Gruyere and kale with the buttery onion mixture, either in a 9-by-13-inch casserole dish or in the braiser.
- In a large bowl, whisk together the milk, cream, mustard, salt, nutmeg, eggs, thyme, hot sauce and a bunch of turns of pepper. Pour into the casserole dish over the bread mixture. Top with another little sprinkle of Gruyere. Cover with foil and bake immediately or refrigerate up to 24 hours.
- Bake, covered, for 30 minutes. Remove the foil and continue to bake until browned on top and set throughout, about another 30 minutes.
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Jorge Monkey
m_jorge62@gmail.comI highly recommend this casserole to anyone who loves a hearty and delicious breakfast. It's easy to make and sure to please everyone.
Bonsai Traveller Dhyan Nirakar
n-b66@yahoo.comThis casserole is simply delicious. The flavors of the kale, cheese, and eggs blend together perfectly.
Mrengo Lesh
lesh@hotmail.comThis casserole is always a crowd-pleaser. I've made it for family gatherings, potlucks, and even work parties. It's always a hit!
Ani Joseph
j_ani58@gmail.comThis casserole is a healthier alternative to traditional breakfast options. It's packed with vegetables and protein.
Muhammad Haseeb
h-muhammad@yahoo.comThis casserole freezes well, which is great for meal prep. I like to make a few casseroles at once and then freeze them for later.
eze nnamdi
n.eze70@gmail.comThis casserole is a great time-saver. I can make it ahead of time and then just pop it in the oven when I'm ready to eat.
Meryem Charki
m@yahoo.comI love that this casserole can be served for breakfast, lunch, or dinner. It's also great for potlucks and parties.
Arman Wared
waredarman91@yahoo.comThis casserole is so easy to make, even for a beginner cook. I didn't have any problems following the recipe.
Miljenko Guzic
miljenko-guzic@gmail.comMy kids loved this casserole! They especially liked the cheesy topping. I will definitely be making it again for them.
Santos Badex
santos34@gmail.comI got creative with this casserole and added some chopped sun-dried tomatoes and artichoke hearts. It was a delicious and unique twist on the classic recipe.
Christopher Trejo
trejoc@aol.comThis casserole is very affordable to make. I used store-brand ingredients and it still turned out great.
Munib Marwat
m.m72@gmail.comI added some cayenne pepper to this casserole to give it a little kick. It was delicious! I love the spicy flavor with the creamy cheese.
Yasrib Arafat
ay29@hotmail.frI made this casserole for a brunch party and it was a huge success. Everyone loved it! I will definitely be making it again.
Arslan Safi
arslan_safi25@aol.comThis casserole is a healthy and delicious way to start the day. The kale is packed with nutrients and the eggs are a good source of protein.
Melani Talvik
t-melani51@gmail.comI've been making breakfast casseroles for years and this is one of the best. The combination of kale, cheese, and eggs is perfect. I also like that it can be made ahead of time.
Juna Sunar
sunar-j@hotmail.co.ukAs a busy mom, I appreciate recipes that are easy and quick to make. This casserole was both. I prepped it the night before and baked it in the morning. It was a lifesaver!
Sayeda Ashraf
as0@hotmail.comThis was my first time making a breakfast casserole and it came out perfectly! I followed the recipe exactly and it was delicious.
Caroline Mbatha
caroline-mbatha34@yahoo.comI'm a vegetarian, so I omitted the bacon and used crumbled tofu instead. It turned out great! The kale and cheese were a perfect combination.
Alishba Malik
malik-a87@hotmail.comEasy and packed with flavor! This casserole was a hit with my family. I used sharp cheddar cheese and added some diced ham. Definitely a keeper!