01 -
Boil a large pot of water and add chicken bouillon. Add the green beans and cook for 5 minutes until bright green and tender-crisp. Drain and transfer to an ice bath. Once cooled, set aside.
02 -
In a large skillet, cook the chopped bacon until crispy. Remove the bacon and set aside, leaving the rendered fat in the skillet.
03 -
Using the same skillet, add diced onion, minced garlic, and mushrooms. Sauté for 7–8 minutes until softened and fragrant.
04 -
Sprinkle the flour over the sautéed vegetables and cook for 3 minutes, stirring frequently. Slowly whisk in the chicken broth and heavy cream over medium-low heat. Stir until the sauce thickens. Season with garlic powder, onion powder, salt, pepper, and nutmeg.
05 -
Stir in Parmesan cheese until melted. Mix in the crispy bacon and blanched green beans gently. Adjust seasoning with more salt or pepper if needed.
06 -
Transfer the mixture to a baking dish and bake at 350°F for 25 minutes.
07 -
Sprinkle the crispy French fried onions on top of the casserole. Bake for an additional 5 minutes until golden and crispy.