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Green Bean and Mushroom Mac Casserole

Green Bean and Mushroom Mac Casserole


  • 4 tablespoons butter, cut into pieces

  • 1/2 pound cremini mushrooms, sliced

  • 2 large shallots, chopped

  • 4 cloves garlic chopped

  • 2 tablespoons fresh thyme, chopped

  • Salt

  • 3 tablespoons flour

  • 1/2 cup dry sherry or white wine

  • 1 pint half-and-half

  • 1 cup chicken stock

  • White pepper

  • 2 cups shredded white sharp cheddar

  • 1/2 cup grated parm

  • 1 pound short-cut pasta, such as cavatappi, penne or shells

  • 12 ounces haricots verts

  • 1 container French’s fried onions


In a large skillet, melt the butter over medium to medium-high heat. Add the mushrooms and cook, stirring occasionally until browned, 3-5 minutes. Add the shallots, garlic and thyme; season with salt. Cook stirring occasionally, until the shallots soften, 2-3 minutes more.

Sprinkle with the flour; stir 1 minute. Stir in the sherry then the half-and-half and stock. Bring to a bubble and cook, stirring occasionally, until the sauce thickens, about 3 minutes. Season with white pepper. Add in both cheeses and stir until melted, about 2 minutes.

Meanwhile, bring a large pot of water to a boil for the pasta. Salt the water, add the pasta and cook 5 minutes. Add the green beans to the water and cook 2-3 minutes more, until the pasta is al dente. Drain the pasta and green beans in a colander then mix them into the mushroom cheese sauce. Transfer to a casserole dish and top with the fried onions.