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  • 2 tablespoons olive oil
  • 12 ounces sliced mushrooms
  • 1 Vidalia onion, diced
  • 8 ounces fresh baby spoon spinach
  • 1 teaspoon thyme
  • 1/4 teaspoon nutmeg
  • 1/4 teaspoon salt
  • 1/4 teaspoon freshly ground pepper
  • 1 tablespoon butter
  • 1 tablespoon flour
  • 3/4 cup vegetable broth
  • 1/2 cup cream
  • 1 (8-ounce) tube prepared polenta, cut into ΒΌ-inch slices
  • 1/2 cup shredded Gruyere cheese
  • 1/2 cup shredded Parmesan cheese


  1. Preheat oven to 350F.
  2. Heat a skillet over medium-high heat and add olive oil. Add mushrooms and sauté, stirring occasionally until lightly browned. Add  onion and cook over medium heat until translucent. Stir spinach, thyme, nutmeg, salt and black pepper. Cook until  spinach wilts.
  3.  Spread mixture evenly over  bottom of a 2-quart casserole.
  4.  Melt butter in a small saucepan. Whisk in flour, and cook over medium-high heat. Add broth and cream and whisk until thickened, about 5 minutes. Season lightly with salt and pepper and pour over spinach.
  5.  Arrange  polenta slices on top of spinach and sauce in overlapping concentric circles, pressing to submerge  polenta slightly. Sprinkle  shredded cheeses over  polenta. Cover with foil and bake  30 minutes. Remove from oven and preheat broiler.
  6.  Uncover polenta and broil 6 inches from  heat about 2 minutes or until browned and bubbly. Let stand 10 minutes before serving.
Recipe courtesy of Nancy Vienneau and Third Thursday Potluck

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The recipe was originally published as Spinach Mushroom Polenta Casserole on

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