For the Keto Bread Cubes (See Recipe Notes for Alternative):
Preheat the oven to 250°F and line a rimmed baking sheet with aluminum foil. Cut 12 ounces Keto Bread into cubes. For me, this is usually 12 slices of keto bread. Place the cubes on the rimmed baking sheet, toast in the oven for 20 minutes, toss, and then toast them for 20 more minutes. Set them aside.
12 ounces Keto Bread
For the Mornay Sauce:
Place 2 ⅔ cups Heavy Cream in a medium saucepan with ¼ Onion, 8 Whole Cloves, and 2 Bay Leaves.
2 ⅔ cups Heavy Cream, ¼ Onion, 8 Whole Cloves, 2 Bay Leaves
Over medium high heat, bring the liquid just to a boil and then drop the heat to a simmer. To prevent scorching, burning, or a yucky skin, stir continuously for the next 10-15 minutes or until the liquid has thickened and reduced by about a third.
Use a fine mesh strainer to remove the onion, cloves, and bay leaves from the sauce. Pour the liquid back into the saucepan and set it over medium heat.
Stir in 2 ounces Parmesan Cheese (grated) and 2 ounces Gruyere Cheese (shredded) until all the cheese is melted. Once done, remove the sauce from the heat and set it aside until assembly time.
2 ounces Parmesan Cheese, 2 ounces Gruyere Cheese
For the Keto Gruyère Bread Pudding:
In a stand mixer or large mixing bowl with a hand mixer, beat 2 Eggs, 1 cup Chicken Broth or Stock, and 2 cups Mornay Sauce (as made above).
2 Eggs, 1 cup Chicken Broth or Stock, 2 cups Mornay Sauce
Once that mixture is cohesive, add in 1 teaspoon Kosher Salt, 1 teaspoon Ground Black Pepper, ½ teaspoon Nutmeg (freshly grated), ½ teaspoon Paprika (preferably Smoked), and ½ teaspoon Dried Parsley. Beat for another 30 seconds to get that all incorporated.
1 teaspoon Kosher Salt, 1 teaspoon Ground Black Pepper, ½ teaspoon Nutmeg, ½ teaspoon Paprika, ½ teaspoon Dried Parsley
Then add 6 ounces Gruyère Cheese (shredded and 2 ounces Parmesan Cheese (grated). Beat it again to get everything well mixed.
6 ounces Gruyère Cheese, 2 ounces Parmesan Cheese
Fold in the Keto Bread Cubes.
12 ounces Keto Bread Cubes
Liberally grease a 9x13-inch casserole dish with nonstick cooking spray before pouring in the mixture. Place the casserole in the refrigerator to sit overnight or for about 8 hours.
To bake, remove the Keto Gruyère Bread Pudding from the refrigerator about 30 minutes before baking and preheat the oven to 325°F. Bake the casserole uncovered for 1 hour or until cooked through. (Alternatively, you can put the cold casserole dish into the cold oven and then preheat it with the dish in it. Just don’t start the clock for baking time until the oven has come up to temperature.)
If you either can’t find or do not want to use store bought keto bread for your Keto Bread Cubes, I suggest making this Keto Cheese Bread from All Day I Dream About Food.
Once it’s baked, allow it to cool, cube it, and then dry it in the oven on a rimmed baking sheet like you would for the store bought keto bread.
For this Keto Gruyere Bread Pudding, I would use all of the Cheesy Keto Bread from 1 recipe.