Creating the Chicken, Spinach, and Mushroom Low-Carb Oven Dish can be accomplished in a few straightforward steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C) and grease a baking dish with olive oil.
2. Prepare Chicken: Season the chicken breasts with salt, pepper, onion powder, and garlic powder. Place them evenly on the bottom of the prepared baking dish.
3. Cook Mushrooms: In a skillet over medium heat, add a drizzle of olive oil and sauté the sliced mushrooms until they become tender. This should take about 5 minutes.
4. Add Garlic: Add minced garlic to the skillet, cooking for an additional minute until fragrant.
5. Mix Spinach: Stir in the chopped spinach and cook until wilted. Remove from heat.
6. Combine Cheese: In a bowl, mix the softened cream cheese and half of the mozzarella. Add the spinach and mushroom mixture to this bowl and stir until combined.
7. Layer the Mixture: Spoon the spinach and mushroom mixture over the seasoned chicken breasts, spreading evenly.
8. Top with Cheese: Sprinkle the remaining mozzarella cheese on top of the layered vegetables.
9. Bake: Place the dish in the preheated oven and bake for 35–40 minutes or until the chicken is cooked through and the cheese is golden and bubbly.
10. Garnish and Serve: Once baked, let it cool for a few minutes. Garnish with fresh parsley if desired and serve hot.

With these steps, you will create a delightful Chicken, Spinach, and Mushroom Low-Carb Oven Dish that’s both delicious and healthy.