If using fresh spinach, rinse it under cold water to remove any dirt. In a large pot, add the spinach and a splash of water. Cover and cook over medium heat until wilted, about 3-5 minutes. Drain and chop the spinach, squeezing out excess moisture.

In a separate saucepan, melt the butter over medium heat. Add the minced garlic and cook until fragrant, about 1 minute. Sprinkle in the flour and stir to combine, cooking for an additional minute.

Gradually whisk in the heavy cream, ensuring there are no lumps. Continue cooking until the sauce thickens, then stir in the Parmesan cheese, onion powder, salt, and pepper.

In a large mixing bowl, combine the chopped spinach with the creamy sauce. Ensure the spinach is well-coated.

Pour the spinach mixture into a greased casserole dish. Sprinkle breadcbs evenly across the top for a crunchy finish.

Preheat your oven to 350°F (175°C) and bake the casserole for about 20-25 minutes or until bubbly and the top is golden brown.

Let it cool for a few minutes before serving. Enjoy!