One thing I did not change was the French fried onions. I still love these, no matter how bad they are bad they are.
Green Bean Casserole
1 Tbsp olive oil
8 oz button mushrooms, cleaned and quartered
3 Tbsp butter
2 1/2 Tbsp flour
3 Tbsp dry sherry
1 1/2 cups milk
1/4 tsp dried thyme
Salt and pepper
12 oz fresh or frozen green beans
2 oz canned French fried onions
Heat olive oil in medium skillet over medium heat. Brown mushrooms in oil for 4-5 minutes. Add butter to pan and swirl until melted. Quickly stir in flour and cook 2 minutes.
Stir in sherry and cook 30 seconds. Whisk in milk and thyme. Bring to a boil and cook 2 minutes, or until thickened. Season to taste with salt and pepper. Set aside to cool slightly.
While sauce is cooling, bring two quarts of water to a boil. Add green beans and cook 2 minutes for fresh or 5 minutes for frozen. Drain well. Pour into greased two quart casserole dish.
Pour sauce over green beans and mix well. Bake in 350 degree F oven for 50-55 minutes. Top with French fried onions and return to oven. Bake 5 minutes more, or until onions are browned. Serve immediately.