FIRST STEP: PREPARE THE SPINACH

1. Sauté the Onion and Garlic: Begin by heating olive oil in a large skillet over medium heat. Add the chopped onion and sauté until softened and translucent, about 5 minutes. Add the minced garlic and cook for another 1-2 minutes until fragrant.
2. Wilt the Spinach: Add the fresh spinach to the skillet in batches, allowing it to wilt down. Stir occasionally until all the spinach has wilted and any excess moisture has evaporated, about 5 minutes. Remove from the heat and let it cool slightly. Once cooled, squeeze out any excess liquid from the spinach using a clean kitchen towel or cheesecloth.

SECOND STEP: PREPARE THE EGG MIXTURE

1. Whisk the Eggs: In a large mixing bowl, whisk together the eggs, milk, dried oregano, dried basil, salt, black pepper, and nutmeg. The eggs should be well-beaten, with the milk fully incorporated for a smooth texture.
2. Add the Cheeses: Stir in the ricotta cheese, shredded mozzarella, and grated Parmesan cheese until well combined. This will create a creamy, cheesy egg mixture that binds all the ingredients together.

THIRD STEP: COMBINE SPINACH AND EGG MIXTURE

1. Combine the Spinach and Egg Mixture: Add the sautéed spinach and onion mixture to the egg and cheese mixture. Stir gently to combine, making sure the spinach is evenly distributed throughout the egg mixture.

FOURTH STEP: ASSEMBLE AND BAKE

1. Prepare the Baking Dish: Grease a 9×13-inch baking dish with olive oil or non-stick cooking spray. Pour the spinach and egg mixture into the dish, spreading it out evenly.
2. Bake the Brunch Bake: Preheat the oven to 375°F (190°C). Place the baking dish in the oven and bake for 45-50 minutes, or until the top is golden and the center is set. You can check for doneness by inserting a knife or toothpick into the center—it should come out clean when fully baked.
3. Cool and Garnish: Once baked, remove the dish from the oven and allow it to cool for a few minutes. Garnish with freshly chopped parsley for a burst of color and freshness before serving.

FINAL STEP: SERVE AND ENJOY

1. Slice and Serve: Slice the Spinach Ricotta Brunch Bake into squares or rectangles and serve warm. It pairs wonderfully with a side of fresh fruit, a light salad, or crispy toast.