Megan's Green Beans

Megan makes the green bean casserole for our Thanksgiving and they are so good, here is her recipe from "thenovicechefblog"

The Best Green Bean Casserole Recipe:

serves 8 (megan doubles this)

Ingredients:
2 Tbslp kosher salt
1.5 lbs fresh green beans, rinsed and ends trimmed
2 Tblsp butter
1 small onion, chopped
2 gloves garlic, minced
2 large portabello mushrooms, chopped
1/2 to 1 tsp freshly ground black pepper to taste
2 Tblsp all purpose flour
1 cup chicken broth
1 cup half and half
1/2 cup breadcrumbs
6 oz french fried onions

Directions:
Preheat oven to 375, grease a 9 x 13 casserole dish and set aside.
Blanch the beans: In a large pot bring about a gallon of water and 2 Tblsp of salt to a boil.  Add the green beans and boil for 5 minutes.  Drain in a colander and immediately plunge the beans into a large bowl of ice water to stop the cooking process. Drain and set aside
Melt butter in large skillet over medium heat.  Add garlic and onion, stirring occasionally, until the onions begin to soften, about 4 to 5 minutes.  Add the mushrooms, salt and pepper and continue to cook for another 1 to 2 minutes.
Sprinkle in the flour and stir to combine.  Cook for 2 minutes.  Add the chicken broth and stir to combine.  Then add the half and half and simmer until the mixture thickens, stirring occasionally, approximately 6 to 8 minutes.
Remove from the heat and stir in all of the green beans.  Transfer the green bean mixture to prepared casserole dish.  Top with bread crumbs and then layer the french fried onions on top.
Place casserole in the oven and bake until bubbly, about 20 min If the onions start to brown too quickly then cover casserole with foil. Serve immediatley