For quick and easy breakfasts, I often make this veggie-rich casserole the night before, allow it to cool, and then cover and refrigerate. Gently reheat individual portions, as needed, in the microwave or oven.
This meat-free dish is loaded with flavor and I usually prepare it precisely as described below. On occasion, however, I layer a half cup of finely chopped deli ham over the spinach. Optionally, cooked bacon or sausage could be added.
1cup(4 ounces) shredded mozzarella, sharp cheddar or Italian blend cheese*
2thinly sliced green onions, white and green parts (I often substitute 2-3 tablespoons snipped fresh chives)
¼cupgrated Parmesan cheese
9large eggs, beaten
¼cupunflavored sparkling water or milk**
½level teaspoon kosher salt and ¼ teaspoon freshly ground black pepper (use ¼ teaspoon if using fine grain or table salt)
Optional for serving: a drizzle of your favorite hot sauce or green Tabasco; a sprinkle of chopped avocado
Instructions
Preheat the oven to 375℉. Grease a 9-inch square baking dish.( A 7x11 casserole dish or a 10-inch round pan will be a rough equivalents. For thicker pieces, use an 8-inch square pan. See next paragraph for a one-pan option.)
Heat a large, lightly oiled pan over medium heat. Add the spinach*** and stir until wilted and some of the moisture cooks off, about 2-3 minutes. Transfer the spinach to the prepared dish and spread it evenly over the bottom. (If you have an oven-proof skillet with a 9- or 10-inch diameter, you can use it to wilt the greens and cook the casserole. The heat of the pan may reduce the baking time by a few minutes; check a little early.)
Evenly sprinkle the one cup grated cheese over the spinach, followed by the sliced onions and the Parmesan.
In a medium bowl, whisk the eggs until blended. Stir in the sparkling water or milk and the salt and pepper. Pour the eggs over the spinach/cheese mixture. Using a fork, gently work the eggs under the spinach and cheese. (Make-ahead tip: At this point you may cover and refrigerate until ready to bake. Allow to sit at room temperature as the oven preheats.)
Bake for approximately 20 minutes or until the mixture is just set in the middle and becoming lightly golden. The 8-inch square pan or 9-inch skillet option will likely require 4-5 extra minutes. Take care not to overcook as eggs tend to turn rubbery. Precise cooking time will depend on the exact proportions of the baking dish and the individual oven. The slightest bit of undercooked center is perfect as the eggs will continue to cook for a few minutes once removed from the oven. Let cool for 5 minutes before cutting. Leftovers may be gently reheated in the microwave or eaten at room temperature.
Notes
*I often use mozzarella cheese in this recipe. I love Sargento's traditional mozzarella which has a nice, thick cut, although a sharp cheddar or Italian blend are also quite nice. You could even use a Mexican blend cheese and stir in some chopped red pepper and/or black olives and then top with a spoonful of guacamole or chopped avocado. Sometimes, I add some shredded deli ham (2 ounces or ½ cup is enough to enhance the flavor). The recipe is delightful as is but also a perfect blank slate on which to build.
**Recently, I've been experimenting with club soda or seltzer water (any flavorless sparkling water will work) instead of milk to create a little extra lightness to scrambled and baked eggs. If you don't have any, milk may be used instead. If you have neither, don't worry. I've made this recipe with no added liquid and it is still quite good.
***To quickly wilt the spinach, I often cook it in the microwave for about a minute in a vented bowl. Not that when microwaving the spinach, you will need to squeeze out the excess water. Tip: A microwave popcorn popper doubles beautifully as a vegetable steamer. It's just a big bowl with a vented lid ᠆ inexpensive and ideal for quickly steaming veggies in the microwave...and making popcorn, of course!
NUTRITION INFORMATION based on 6 servings: Calories: 187 Fat: 11.9g Saturated fat: 5g Carbohydrates: 3.3g Fiber: 0.7g Protein: 17.4g