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Overhead picture of cooked green bean casserole in a white baking dish.
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5 from 10 votes

Green Bean Quinoa Casserole

this Green Bean Quinoa Casserole is packed with flavor and will be a huge crowd pleaser!
Prep Time10 mins
Cook Time25 mins
Total Time35 mins
Course: brunch, dinner, Side Dish, vegetarian
Cuisine: American
Diet: Gluten Free
Servings: 6 servings
Calories: 247kcal
Author: Lauren Kelly


  • 1 cup quinoa
  • 1 ½ cup vegetable broth
  • 1 teaspoon olive oil
  • ½ cup chopped onion
  • 2 garlic cloves minced
  • ½ teaspoon salt
  • 1 cup mushrooms sliced
  • 1 ½ pounds fresh green beans ends trimmed
  • 2 tablespoon whole wheat flour
  • ½ cup cheddar cheese shredded
  • ½ cup milk
  • 1 cup vegetable broth
  • ¼ cup fried onions
  • 2 tablespoons panko bread crumbs
  • ¼ cup Parmesan cheese


  • Preheat oven to 350 degrees.
  • Place quinoa and 1 ½ cup broth into large sauce pan and bring to a boil over medium-high heat.
  • Once boiling, reduce heat to low, cover and let simmer for 15-20 minutes until all broth is absorbed.
  • While quinoa is cooking, bring a large pot of salted water to boil over high heat.
  • Add green beans and cook for about 3 minutes so they are crisp and not fully cooked. Drain in colander and set aside.
  • In a large skillet, add oil. onion and garlic and cook 3-4 minutes until softened.
  • Add mushrooms and cook another 3-4 minutes.
  • Add flour to mushroom mixture and mix well.
  • Add broth and milk and continue to stir to prevent lumps. Cook for 3-4 minutes.
  • Add cheese, quinoa and green beans and remove from heat.
  • Top with Parmesan cheese, fried onions and panko crumbs.
  • Place in a baking dish and cook for 30 minutes uncovered.


Place any leftovers in an airtight container and place in the refrigerator for up to 5 days.
If reheating, place in baking dish and bake at 350 degrees for 15 minutes. Microwaving might make it mushy.


Calories: 247kcal | Carbohydrates: 31g | Protein: 12g | Fat: 9g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Cholesterol: 15mg | Sodium: 773mg | Potassium: 509mg | Fiber: 6g | Sugar: 6g | Vitamin A: 1155IU | Vitamin C: 14mg | Calcium: 205mg | Iron: 3mg