All-Purpose Breakfast Casserole

• FOR THE CASSEROLE BASE:
• 6 slices Texas Toast, Or Other Thick Sliced Bread, Cut Into 1-inch Cubes
• 8 whole Eggs
• 2 cups Milk
• 1-1/2 teaspoon Dry Mustard
• 1-1/2 teaspoon Salt
• 1/2 teaspoons Pepper
• 1 teaspoon Hot Sauce
• FOR THE VEGETARIAN VERSION:
• 1 Tablespoon Olive Oil
• 1 whole Onion, Chopped
• 16 ounces, weight Sliced Mushrooms
• 3 cloves Garlic, Chopped
• 18 ounces, weight Frozen, Chopped Spinach, Defrosted And All Liquid Drained/squeezed Out
• 8 ounces, weight Fontina Cheese, Shredded
• FOR THE SAUSAGE AND CHEESE VERSION:
• 1 pound Breakfast Sausage, Cooked Until Browned, Drained
• 8 ounces, weight Sharp Cheddar Cheese, Shredded

1. For the vegetarian toppings:
2. Heat the olive oil over medium heat in a large skillet. Add the chopped onions and saute until softened, then add in the sliced mushrooms and chopped garlic. Stir until evenly combined and saute until the mushrooms have softened and caramelized. Break up the drained spinach and stir it into the mushroom mixture until evenly distributed. Remove from heat and set aside until ready to use.
3. For the casserole assembly:
4. Spray a 9x13 baking dish with cooking spray. Scatter the bread cubes along the bottom of the pan. Cover the bread with desired toppings according to the vegetarian or the sausage and cheese version ingredients lists above.
5. In a large bowl combine the eggs, milk, dry mustard, salt, pepper and hot sauce. Whisk until evenly combined. Pour over the casserole dish. Cover and refrigerate overnight.
6. The next morning, preheat the oven to 350 F. Pull the casserole from the refrigerator and set it on the counter to let it come to room temperature. Top with desired cheese (listed above). Bake for 50-60 minutes, or until the eggs are set and the cheese is melted.

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Taken from tastykitchen.com/recipes/breakfastbrunch/eggs-breakfastbrunch/all-purpose-breakfast-casserole/ (may not work)