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Mushroom & Cheddar Stuffed Onions

WebMD Recipe from

Total Time: 1 1/4 hrs

Mushroom & Cheddar Stuffed Onions

In this recipe for stuffed onions, mild onion layers are filled with a tasty mushroom and Cheddar cheese blend spiked with sage and a splash of dry sherry. Serve as a vegetarian main dish for 4 or as a vegetable side dish for 8.


  • 1 large sweet onion, (about 1 pound)
  • 1 tablespoon unsalted butter
  • 1/4 cup finely chopped shallots
  • 1 tablespoon minced garlic
  • 8 ounces cremini mushrooms, very finely chopped
  • 1/4 teaspoon plus 1/8 teaspoon salt, divided
  • 1/4 teaspoon plus 1/8 teaspoon freshly ground pepper, divided
  • 1/4 cup dry sherry, or dry white wine
  • 4 teaspoons chopped fresh sage, divided
  • 3/4 cup shredded extra-sharp Cheddar
  • 3/4 cup coarse fresh breadcrumbs, preferably whole-wheat (see Tip)
  • 1/4 cup finely chopped flat-leaf parsley
  • 1/2 teaspoon Worcestershire sauce, preferably vegan
  • 1/4 teaspoon Tabasco
  • 2 teaspoons extra-virgin olive oil


Step 1
Preheat oven to 425°F. Coat an 8-inch-square baking dish with cooking spray.
Step 2
Bring a large pot of water to a boil. Trim the ends off the onion and cut in half lengthwise; peel. Cook the onion halves in the boiling water for 2 minutes. When cool enough to handle, remove the 4 largest outer layers from each half. Return the remaining pieces to the pot and boil for 5 minutes more to cook through. Set aside. Using tongs, return the 8 onion layers to the boiling water and cook until soft and pliable, 1 to 4 minutes, pulling each layer out as it’s done. Set aside on a plate.
Step 3
Heat butter in a large nonstick skillet over medium heat. Add shallots and garlic; cook, stirring, until the shallots are soft, 4 to 5 minutes. Add mushrooms and 1/4 teaspoon each salt and pepper. Add sherry (or wine); cook, stirring, until almost all the liquid has evaporated and the mushrooms form a soft mass, 8 to 10 minutes. Stir in 2 teaspoons sage; cook 30 seconds more. Transfer the mixture to a medium bowl; stir in cheese, breadcrumbs, parsley, Worcestershire and Tabasco. Finely chop the reserved onion core; add to the bowl.
Step 4
To stuff an onion layer, hold it with the curved side cupped in your hand. Spoon 4 to 5 tablespoons of stuffing into the center and gently form it into a football-shaped packet. Lay the packet seam-side down in the baking dish and repeat with the remaining layers. Brush the packets with oil and sprinkle with the remaining 2 teaspoons sage and 1/8 teaspoon each salt and pepper. Cover the dish with foil.
Step 5
Bake until the onions are bubbling, 15 to 25 minutes. Serve hot or warm.


Tip: To make your own fresh breadcrumbs, trim crusts from whole-wheat bread. Tear bread into pieces and process in a food processor until coarse crumbs form. To make fine breadcrumbs, process until very fine. To make dry breadcrumbs, spread coarse or fine breadcrumbs on a baking sheet and bake at 250°F until dry, about 10 to 15 minutes. One slice of bread makes about 1/2 cup fresh breadcrumbs or about 1/3 cup dry breadcrumbs. For store-bought coarse dry breadcrumbs we like Ian’s brand, labeled “Panko breadcrumbs.” Find them at well-stocked supermarkets.

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