This asparagus egg bake is perfect for brunch! Made with mushrooms and Swiss cheese, it can be prepared overnight – make this easy egg casserole your go-to breakfast recipe!
Preheat oven to 350 degrees F (175 degrees C). Grease a 2-quart casserole dish with butter or non-stick cooking spray.
In a large skillet, melt the butter over medium heat. Add the shallots and sauté for 1 minute.
Add the asparagus and mushrooms and sauté them, stirring frequently, for 5-7 minutes until the asparagus is soft. Transfer to the prepared casserole dish.
Sprinkle the Swiss cheese evenly on top of the vegetables.
In a large bowl, beat the eggs with a fork or a whisk. Mix in the milk, parsley, salt, and black pepper.
Pour the egg mixture over the cheese.
Bake in the oven for 35 to 40 minutes, until a knife inserted in the center comes out clean.