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Portobello Mushrooms Stuffed with Spinach, Parmesan and Fennel

Updated February 23, 2016
(1 Votes)

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My family loves meat, but I make it a point regularly to tempt them with tasty vegetarian meals. Portobello mushrooms, with their hefty size and meaty texture, are nearly as satisfying as a tender beef fillet, especially when the mushrooms are stuffed with spinach, cheese, fennel, and fresh tarragon and parsley. As an added bonus, the flavor-packed stuffing also includes shiitake mushrooms, which enhance the portobellos’ earthy taste. If your guest list includes a vegan—a strict vegetarian who avoids dairy products—substitute bread crumbs for the cheese, adding just enough to lightly bind the stuffing. I like to serve these healthy mushrooms for lunch with sliced heirloom tomatoes over baby arugula to brighten up the plate.

Serves4

Cooking Methodbaking

CostModerate

Easy

Total Timeunder 1 hour

Make Ahead RecipeYes

OccasionCasual Dinner Party

Recipe Coursemain course

Dietary Considerationmain course

Equipmentbaking/gratin dish

Mealbrunch, dinner, lunch

Taste and Texturecheesy, garlicky, herby, savory, umami

Type of Dishvegetable

Ingredients

  • 4 large portobello mushroom caps (about 1½ pounds total)
  • ¼ cup olive oil, plus more for oiling the baking dish
  • ½ cup finely minced shallots (from 3 medium-size shallots)
  • 1½ cups finely minced fennel (2 small bulbs)
  • 4 cloves garlic, finely minced
  • 6 ounces shiitake mushrooms, stems discarded, caps minced (about 1 cup)
  • 12 ounces baby spinach, cut into ribbons (about 8 cups)
  • ¼ cup minced fresh flat-leaf parsley
  • 3 tablespoons minced fresh tarragon
  • 1¼ cups freshly grated Parmesan cheese
  • Salt and freshly ground black pepper

Instructions

Wipe the portobello mushroom caps clean with a damp paper towel. Using a small paring knife or teaspoon, remove the gills to create a shallow depression for the stuffing. Place the portobellos on a lightly oiled baking dish and set aside.

Position a rack in the center of the oven and preheat the oven to 400°F.

Heat the olive oil in a large skillet over medium-low heat. Add the shallots and fennel and cook until soft, 8 to 10 minutes.

Add the garlic and shiitake mushrooms and cook until the moisture has evaporated, about 10 minutes. Stir in the spinach and cook until it wilts, about 5 minutes, working in batches, if necessary.

Add the parsley, tarragon, and ½ cup of the Parmesan cheese and stir to combine. Cook until the cheese melts, about 1 minute. Season the filling with salt and pepper to taste.

Spoon the filling into the portobellos, mounding it slightly. Sprinkle 3 tablespoons of the remaining Parmesan cheese over each mushroom. (The mushrooms can be prepared up to this stage 4 hours ahead. Refrigerate them, covered until ready to bake.)

Bake the mushrooms until they are tender but not soggy and the cheese on top has browned, 20 to 25 minutes. Serve immediately.

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