Easy & Healthy Green Bean Casserole Recipe
Prep Time:
20 minutes
Cook Time:
1 hour, 5 minutes
Servings:
10 servings
Ingredients
  • 2 yellow onions, thinly sliced
  • 1 tablespoon olive oil
  • ½ cup breadcrumbs
  • ½ cup + ⅓ cup flour, divided
  • 2 teaspoons salt, divided
  • 2 pounds fresh green beans
  • ¼ cup unsalted butter, divided
  • 1 pound sliced baby bella mushrooms
  • ½ teaspoon pepper
  • 2 cups vegetable broth
  • 2 teaspoons minced garlic
  • ½ cup grated parmesan cheese
Directions
  1. Preheat the oven to 425 F. Spray a large baking sheet with nonstick cooking spray.
  2. In a large bowl, add the sliced onions, oil, breadcrumbs, ½ cup flour, and ½ teaspoon salt. Using tongs, mix to combine. Pour onto a baking sheet and bake for 20 minutes.
  3. In a large skillet over medium heat, add 2 tablespoons butter. Once melted, add in the mushrooms, 1 teaspoon salt, and ½ teaspoon pepper. Sauté the mushrooms until they're darker in color and smaller in size, about 8 minutes. Transfer the mushrooms to a bowl.
  4. In the same skillet you just cooked the mushrooms in, create the roux. Add in the remaining 2 tablespoons butter. Once melted, add in the ⅓ cup remaining flour. Whisk well. Then, add in the broth and continue to whisk. Simmer for 5 minutes.
  5. Spray a large, 9x13-inch baking dish with nonstick cooking spray. In a large bowl, add the mushrooms, green beans, and half the onion mixture. Add the parmesan cheese and garlic. Using tongs, mix to combine. Pour this mixture into the baking dish.
  6. Pour the roux over the vegetables. Reduce the oven's heat to 350 F. Cover the dish with foil and bake for 30 minutes.
  7. Remove the baking dish from the oven. Remove the foil. Add the remaining onions on top. Return the baking dish to the oven and bake for 10 more minutes.