Preparation Steps

• Preheat your oven to 375°F (190°C).
• In a large skillet, melt the butter over medium heat. Add the chopped onion and cook until translucent, about 5 minutes.
• Stir in the minced garlic and cook for another minute until fragrant.
• Add the fresh spinach, nutmeg, salt, and pepper. Cook until the spinach is wilted, about 5 minutes.
• Pour in the heavy cream and simmer for 3-4 minutes, allowing the mixture to thicken slightly.
• Transfer the spinach mixture to a baking dish. Top with grated Parmesan and Gruyère cheese.
• Sprinkle the breadcrumbs evenly over the top of the cheese.
• Bake in the preheated oven for 15-20 minutes, or until the top is golden brown and bubbly.
• Remove from the oven and let it cool for a few minutes before serving.