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Absolutely Delicious Homemade Green Bean Casserole

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PREP TIME
15 min
COOKING TIME
35 min
TOTAL TIME
50 min
SERVINGS
6 servings
Absolutely Delicious Homemade Green Bean Casserole
Ingredients
  • 2 (12 ounce) packages frozen French cut green beans
  • 8 ounces crimini mushrooms, quartered
  • 3 tablespoons butter
  • 1 small onion, halved and thinly sliced
  • 1 tablespoon chopped fresh parsley
  • 2 tablespoons all-purpose flour
  • 1/2 teaspoon lemon zest
  • 1/2 teaspoon salt
  • 1 pinch ground black pepper
  • 1/2 cup milk
  • 1 cup sour cream
  • 1/2 cup shredded Cheddar cheese
  • 1 (2.8 ounce) can French-fried onions
Instructions
1
Initial Preparation
2
Preheat the oven to a high temperature of 350 degrees Fahrenheit (175 degrees Celsius).
3
Tenderizing Green Beans
4
Place green beans in a saucepan and fill it with approximately half an inch of water; bring the mixture to a rolling boil. Cover the saucepan and steam the green beans until they are tender but still retain their vibrant green color, approximately 5 minutes. Drain the excess water.
5
Merging Flavors and Textures
6
Combine the drained green beans with sliced mushrooms in a bowl; mix them together thoroughly.
7
Creating a Rich Sauce
8
Melt butter in a large skillet over medium heat. Add sliced onion and chopped parsley; cook and stir until the onion becomes tender, taking about 5 to 7 minutes. Whisk in flour until it is well incorporated; then mix in grated lemon zest, salt, and pepper. Gradually whisk in milk, stirring constantly to prevent lumps from forming.
9
Adding Creaminess
10
Mix in sour cream until it is fully incorporated. Warm the sauce over medium heat, stirring constantly, until it begins to bubble and emit a rich aroma. Gradually pour in the green beans and mushrooms, stirring to coat them evenly.
11
Finishing Touches
12
Remove the sauce from the heat and toss it briefly with half of the Cheddar cheese and half of the French-fried onions. Transfer the mixture to a 1 1/2-quart casserole dish; top it with the remaining Cheddar cheese and onions.
13
Final Baking
14
Bake the casserole in the preheated oven until the Cheddar cheese is melted and bubbly, approximately 15 minutes.