Absolutely Delicious Green Bean Casserole from Scratch

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C).

2 . Stage

Place green beans in a saucepan and fill with about 1/2 inch water; bring to a boil. Cover and steam until beans are tender but still bright green, about 5 minutes. Drain.

3 . Stage

Combine drained beans in a bowl with mushrooms; toss to combine.

4 . Stage

Melt butter in a large skillet over medium heat. Add onion and parsley; cook and stir until onion is tender, 5 to 7 minutes. Whisk in flour until blended, then mix in lemon zest, salt, and pepper. Gradually whisk in milk, stirring constantly, so that no lumps form.

5 . Stage

Add sour cream and stir until combined. Warm over medium heat until sauce begins to bubble. Dump in green beans and mushrooms, stirring to coat.

6 . Stage

Remove from the heat and toss briefly with 1/2 of the Cheddar cheese and 1/2 of the French-fried onions. Spoon into a 1 1/2-quart casserole dish; top with the remaining Cheddar and onions.

7 . Stage

Bake in the preheated oven until Cheddar is melted, about 15 minutes. Patty Curcio