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French Green Bean and Mushroom Casserole
Cook Time
40 mins
Course: Dinner, Side Dish
Cuisine: American
Author: angela@eatlivehappy
  • 2 tablespoons olive oil
  • 2 tablespoons shallots, minced
  • 2 cloves fresh garlic, minced
  • 2 cups sliced crimini mushrooms
  • 1 cup sliced shiitake or chanterelle mushrooms
  • 3 tablespoons butter
  • 3 tablespoons flour
  • 1/4 cup dry white wine
  • 2 cups half and half
  • 2 teaspoons kosher salt
  • 1/2 teaspoon black pepper
  • 2 12 ounce packages frozen french green beans (hericots verts)
  • 1 1/2 cups crisp fried onions (I used french's)
  • 1/3 cup gruyere cheese, grated
  1. Preheat oven to 350 degrees F.

  2. In a large skillet, heat the 2 tablespoons olive oil. Add shallots and garlic, saute' for a couple of minutes until soft. Add all of the mushrooms and saute' until cooked and lightly browned. Add the white wine, bring to a boil and reduce by half. Remove from skillet and set aside.

  3. In the same skillet add butter and flour, cook stirring often, over med/low heat until very light golden brown. Slowly whisk in the half and half and  bring to a boil then reduce heat to low. Add mushroom mixture and season with salt and pepper.

  4. In a large casserole dish, add the thawed green beans and 1/2 of the crispy onions (3/4 cup). Pour mushroom/cream mixture over the top and stir to evenly coat.

  5. Cover with foil and bake in the preheated oven for 30 minutes.

  6. Remove foil and top the casserole with the rest of the crispy onions and grated cheese. Place back in the oven and bake uncovered for 10-15 minutes until crisped and bubbly. Serve.