Cheesy Mozzarella Green Bean Melt

Serves 6-8

INGREDIENTS:

1 1/2 pounds fresh French green beans, halved, ends removed (or use 2 cans green beans, rinsed and drained)
10 oz. mozzarella cheese, grated
1 cup sour cream
1/4 white onion, finely chopped
3 tablespoons unsalted butter
2 tablespoons all-purpose flour
1/2 teaspoon garlic powder
kosher salt and freshly ground pepper, to taste

DIRECTIONS:

Preheat oven to 400º F and set up a large bowl of ice water next to workstation.
Bring a large pot of salted water to boil and add beans. Cook for 4-6 minutes, or until bright green and tender-crisp.
Transfer green beans to ice bath to stop from cooking further, then drain and place in a large baking dish. (11×7 works well.)
Melt butter in a medium pan or skillet over medium heat.
Once melted, saute onion until softened. About 4 minutes.
Stir in flour and garlic powder and cook for 1 minute, stirring until smooth. Season with salt and pepper.
Mix in sour cream and cook until mixture just begins to boil …