🥘 Ingredients
- haricots verts or French green beans, trimmed and cut into 1-inch pieces 2 ½ pounds
- mushrooms, cut into bite-size pieces 1 pound
- sliced shallots 2 large
- garlic 4 cloves
- olive oil 2 tbsp
- salt
- pepper
- butter 2 tbsp
- flour 2 tbsp
- heavy cream 1 quart
- Cajun seasoning 1 tsp
- onion powder ½ tsp
- garlic powder ½ tsp
- chicken base concentrate (or 1/2 bouillon cube) ½ tsp
- nutmeg ½ tsp
- parmesan 1 ½ cups
- bread crumbs 1 cup
- fried shallots 2 cups
- parmesan ¼ cups
🍳 Cookware
- oven
- 9x13 baking dish
- parchment paper
- large saucepan
- medium bowl
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1Heat oven to 400 F. Coat a 9x13 baking dish with oil.
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2On a rimmed sheet pan lined with parchment paper , toss together haricots verts or French green beans, trimmed and cut into 1-inch pieces , mushrooms, cut into bite-size pieces , sliced shallots , garlic , and olive oil ; season with salt and pepper to taste then spread evenly on the pan.
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3Roast until the vegetables brown in spots and soften, about 30 minutes , tossing halfway through.
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4Meanwhile, in a large saucepan over medium-low heat, melt the butter , then add the flour . Cook for about 1-2 minutes , whisking constantly until it comes together and begins to turn golden in color.
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5Add heavy cream and whisk until it starts to thicken, 6-8 minutes . Add the Cajun seasoning , onion powder , and garlic powder , chicken base concentrate (or 1/2 bouillon cube) , nutmeg and 0.5 tsp pepper. Whisk to combine, then add parmesan until melted. Taste and adjust seasonings.
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6When the green beans are cooked, add them to the saucepan, and toss to coat until mixture is thoroughly heated. Transfer green bean mixture to the baking dish.
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7In a medium bowl , combine bread crumbs , fried shallots , and the remaining parmesan . Spread evenly over the top of the casserole.
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8Set the broiler to high, and broil until brown and bubbly (don’t walk away!), about 1-2 minutes . Serve hot.