Green Bean Casserole
GREEN BEAN CASSEROLE INGREDIENTS:
- 2 pounds fresh green beans, trimmed and cut into bite-sized pieces
- 1 batch Mushroom Alfredo Sauce (see below)
- 1 batch Crispy Onion Topping (see below)
CRISPY ONION TOPPING INGREDIENTS:
- 1 tablespoon butter or olive oil, divided
- 1 medium red onion, peeled and thinly-sliced
- 1/2 cup Panko breadcrumbs
- 1/4 cup freshly-grated Parmesan cheese
- 1/4 teaspoon each fine sea salt and freshly-cracked black pepper
MUSHROOM ALFREDO SAUCE INGREDIENTS:
- 2 tablespoons butter or olive oil
- 8 ounces baby bella mushrooms, thinly sliced
- 4 cloves garlic, pressed or minced
- 3 tablespoons all-purpose flour
- 1/2 cup vegetable stock
- 1 cup milk (I used 2%, but any milk will do)
- 1/2 cup freshly-grated Parmesan cheese
- 1/2 teaspoon fine sea salt
- 1/4 teaspoon freshly-ground black pepper
- Preheat oven to 375°F.
- Heat a large stockpot of water over high-heat until boiling. Meanwhile, trim and cut the green beans. Then add the beans to the boiling water and cook for 2-3 minutes, depending on how crispy you like your green beans. (Keep in mind that the beans will cook more in the oven, so err on the side of undercooking them to your taste during this step.) Then use a slotted spoon or large strainer to transfer the beans immediately into a large bowl of ice water, and give them a quick stir. This will prevent them from cooking longer. Set aside.
- Prepare your crispy onion topping: Melt 1/2 tablespoon butter (or olive oil) in a large sauté pan over medium-high heat. Add the onion and sauté for 2-3 minutes, stirring occasionally, until the onion is partially cooked but still holds its shape. (You don’t want the onion to get too soft.) Transfer the onion to a clean bowl. Add the remaining 1/2 tablespoon butter to the sauté pan, along with the panko, and stir to combine. Cook for 2-3 minutes, stirring constantly, until the panko is lightly golden. Remove from heat, and transfer the panko to the bowl with the onions. Add in the Parmesan, salt and pepper, and toss the onion mixture until evenly combined. Set aside.
- Prepare your mushroom alfredo sauce: Briefly rinse and dry the sauté pan. Then return it to the stove. Melt the butter over medium-high heat. Then add the mushrooms and sauté for 5 minutes, stirring occasionally, until lightly browned and soft. Add the garlic and sauté for 1-2 more minutes, stirring occasionally, until fragrant. Stir in the flour and sauté for 1 more minute, stirring occasionally. Then add in the vegetable stock, and stir until the flour is evenly dissolved. Add the milk and Parmesan, and stir to combine. Continue cooking the sauce until it reaches a simmer and thickens. Then remove from heat, and season with salt and pepper to taste.
- Combine the green beans and mushroom alfredo sauce in the stockpot, and stir the green bean mixture until evenly combined. Transfer to a 9 x 13-inch baking dish, and spread the green bean mixture out in an even layer. Sprinkle evenly with the crispy onion topping mixture.
- Bake for about 25 minutes, or until the crispy onion topping is golden and crispy. (Keep an eye on it so that it does not burn. If it does start to char, simply lay a piece of aluminum foil on top of the casserole. Remove from the oven and serve warm.
- Make-ahead instructions: Follow the recipe through the end of Step 5. Then instead of placing the baking dish in the oven, cover it tightly with foil or plastic wrap and refrigerate for up to 48 hours. Once you are ready to bake the casserole, uncover and bake as directed.
- Storage instructions: If you have leftovers after the casserole has already been baked, just refrigerate them in an airtight container for up to 3 days. (Unfortunately the Alfredo sauce does not freeze well, so I do not recommend freezing this casserole.)
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