French Onion Green Bean Casserole Recipe for Christmas

French Onion Green Bean Casserole is the dish everyone’s expecting on the holidays.It is very easy to create and you can serve it any day. What makes it great,a secret ingredient – cream of mushroom Soup
2 tablespoons butter
2 large yellow onions, thinly sliced lengthwise salt and ground black pepper to taste
1 tablespoon sherry vinegar
2 tablespoons butter
2 1/2 tablespoons all-purpose flour
2 1/2 cups milk
1 pinch ground nutmeg cayenne pepper to taste (optional)
1/4 teaspoon ground thyme
2 tablespoons melted butter
2/3 cup panko bread crumbs
2 pounds fresh green beans, trimmed
4 ounces shredded Gruyere cheese, divided
1/3 cup grated Parmesan cheese

Heat your oven to 190 degrees Celsius.Grease a 9×13 inch casserole dish.
Take 2 tablespoons of butter in a large skillet and heat over medium temperature. Stir the onions into the pan and stir until they become golden brown. Stir in vinegar and move to a small bowl.
Heat 2 more tablespoons of butter in the same pot. Pour in 2 tablespoons flour and stir constantly. Cook over medium heat until the smell of baked pie comes out. Curst,about three minutes. Slowly whisk in milk then nutmeg, cayenne pepper and thyme. Cook until thickened and transfer to a bowl and keep it.
Melt remaining butter on a clean skillet and stir in panko until all crumbs are covered.
Bring a large saucepan of salted water and boil beans over medium heat until they become crispy. Drain them very well.
Pour half spoon of the caramelized onions into the prepared casserole dish. Top with green beans and season with salt and black pepper. Spreads reserved white sauce on the beans and sprinkle the half of cheeses.
Using the back of the spoon push the onions down into chees and sauce. Top with the buttered panko crumbs. Bake them for 30 minutes in a pre-heated oven until they become brown lightly.
Wait 10 minutes before serving.
This special French Onion Green Bean Casserole recipe would be great to serve your guests in Christmas party.

French Onion Green Bean Casserole Recipe for Christmas

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