Shiitake Skillet Bake with Mushroom Gravy

Shiitake mushrooms contain beta-glucans that support immune health and healthy cell development. Roasting them gives the mushrooms a rich, meaty flavor in this hearty skillet bake.

Photo: Photography by Roberto Caruso

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Prep Time
30 min
80 min


  • 1 lb shiitake mushrooms, trimmed
  • 4 tsp extra-virgin olive oil, divided
  • 1/2 tsp each sea salt and ground black pepper, divided
  • 1/2 yellow onion, diced
  • 1 red bell pepper, diced
  • 2 cloves garlic, minced
  • 1 tbsp chopped fresh thyme
  • 1 cup baby spinach, chopped
  • 1 cup cooked brown rice
  • 1/2 cup old-fashioned rolled oats
  • 1 tbsp ground flaxseeds
  • 3 large eggs, whisked
  • 3/4 cup grated mozzarella cheese
  • 1 tbsp Dijon mustard


  • 2 cups low-sodium mushroom broth
  • 1 tbsp arrowroot starch
  • 2 cloves garlic, smashed
  • 3 sprigs fresh thyme
  • 3 tbsp organic unsalted butter, cubed


  1. Preheat oven to 400°F. Line a large baking sheet with parchment paper.
  2. In a large bowl, toss mushrooms with one-half of oil and one-half each of salt and pepper. Spread mixture onto prepared baking sheet; bake until mushrooms are browning, about 30 minutes. Let cool.
  3. Meanwhile, in a medium skillet, heat remaining one-half of oil on medium. Add onion; cook until translucent, about 3 minutes. Stir in bell pepper, garlic and thyme; sauté until fragrant, about 3 minutes. Stir in spinach and remaining one-half of each salt and pepper. Transfer mixture to a large bowl; set aside.
  4. Transfer about one-quarter of roasted mushrooms to a cutting board and slice thinly. Place remaining mushrooms in a food processor. Pulse 6 to 8 times, until chopped but not puréed. Add rice, oats and flax; pulse 6 to 8 more times to incorporate (mixture should still have some chunks). Transfer to bowl with vegetable mixture; stir in eggs, cheese and mustard.
  5. Heat a cast-iron skillet on medium-high; mist with cooking spray. Pour in mushroom mixture and flatten top with a spatula. Bake 30 to 35 minutes, until firm and edges are golden.
  6. In the last 10 minutes of baking, prepare gravy: In a small saucepan, whisk together broth and arrowroot. Add sliced mushrooms, garlic and thyme. Bring to a boil then simmer, stirring, for 8 minutes. Remove garlic and thyme; whisk in butter.
  7. Slice bake into wedges; serve with mushroom gravy.

Related: The Power of Medicinal Mushrooms

Nutrition Information

  • Serving Size 1/4 of recipe
  • Calories 407
  • Carbohydrate Content 33.5 g
  • Cholesterol Content 179 mg
  • Fat Content 24 g
  • Fiber Content 6 g
  • Protein Content 15 g
  • Saturated Fat Content 10 g
  • Sodium Content 599 mg
  • Sugar Content 5 g
  • Monounsaturated Fat Content 9 g
  • Polyunsaturated Fat Content 3 g

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