Try this nearly all fresh casserole for your holiday table! You won't regret it.
Preheat oven to 350
Drain green beans and pour them into your casserole dish
Sauté mushrooms in medium sauce pan with oil. Cook until soft.
Add butter and flour to the mushrooms, cook until flour is golden and mixture is fragrant.
Add milk, salt, pepper, and garlic powder to the mushrooms. Cook on medium heat until the mixture is bubbling, and thickened.
Remove from heat.
Add 1 cup of the friend onions and a large half cup of cheese to the green beans.
Pour sauce mixture over the green beans and gently stir until incorporated.
Bake for 25 min.
Pull casserole out of the oven, and pour the remaining fried onions all over the top. Return to the oven for 5 more min until the fried onions are a dark golden color