01 - Preheat oven to 375°F.
02 - Arrange zucchini slices on paper towels, sprinkle with salt, and let sit for 15 minutes to draw out moisture. Pat dry thoroughly.
03 - In a large skillet over medium heat, melt butter. Add garlic and sauté for 1 minute until fragrant.
04 - Add heavy cream, bring to a gentle simmer, and cook for 3 minutes. Whisk in Parmesan, salt, black pepper, and nutmeg. Stir until smooth and thickened. Remove from heat.
05 - In a mixing bowl, combine ricotta, 1 tablespoon parsley, Italian herbs, and half of the mozzarella. Season with a pinch of salt and pepper.
06 - Lightly brush a 9x13-inch baking dish with olive oil. Spread a thin layer of Alfredo sauce on the bottom.
07 - Layer as follows: zucchini slices (overlapping slightly), half of the chicken, half of the ricotta mixture, spoonfuls of Alfredo sauce, sprinkle mozzarella and Parmesan. Repeat layers, finishing with zucchini, sauce, and remaining cheeses.
08 - Cover the dish loosely with foil and bake for 30 minutes.
09 - Remove foil and bake for another 10-15 minutes, until golden and bubbly. Rest for 10 minutes before slicing. Garnish with remaining parsley.