Eggs Benedict Casserole au Gratin

Directions

For the casserole

1. Grease a 23-cm (9-in) square baking dish. Spread half of the diced English muffins over the bottom of the dish. Sprinkle with half the sausage, all the baby spinach, and half the shredded marble Cheddar cheese. Top with the remaining diced English muffins, sausage, and baby spinach.
2. In a bowl, whisk together the eggs, milk, chives, Dijon mustard, salt, and some black pepper. Pour into the baking dish, then gently press down the layers to soak the diced English muffins into the egg mixture. Sprinkle with the remaining cheese, then cover with plastic wrap. Refrigerate for at least 2 hours or up to overnight.
3. Preheat the oven to 190°C (375°F). Bake for 60 minutes, until the top is golden brown and a knife inserted in the center of the casserole comes out clean. Let the casserole rest for 10 minutes.

For the blended hollandaise

1. In a blender, combine the egg yolks, water, lemon juice, and salt. Blend until frothy. Heat the butter in the microwave or in a small saucepan over medium heat until bubbly (do not brown). With the blender running, pour in the hot butter in a very thin stream, blending until sauce is thick and emulsified. Drizzle over the casserole and serve.