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  • Prep-time: / Ready In:
  • Makes one 9x13-inch casserole

With a mouthwatering mushroom and lentil filling and a browned polenta topping, this rustic shepherd’s pie is sure to satisfy. It’s gluten-free as long as you use gluten-free oat flour. 


  • 4 cups vegetable stock
  • 2 cups unsweetened, unflavored plant-based milk
  • 2 cups dry polenta
  • 2 tablespoons nutritional yeast
  • 2 teaspoons sea salt
  • 1 teaspoon baking soda
  • ½ teaspoon freshly ground black pepper
  • 1 lb. mushrooms, thinly sliced (about 7 cups)
  • 1 medium onion, diced (2 cups)
  • 1 red bell pepper, diced (1 cup)
  • 12 cloves garlic, minced 
  • 2 bay leaves
  • 1 tablespoon dried oregano
  • 1 teaspoon dried thyme
  • 1½ cups vegetable stock
  • ¼ cup oat flour
  • 2 (15-ounce) cans brown lentils, rinsed and drained (3 cups)
  • 1 (16-ounce) bag of frozen mixed vegetables
  • 1 tablespoon white wine vinegar
  • 1 tablespoon fresh parsley (plus more for garnish)
  • Sea salt and freshly ground black pepper, to taste
  • Hot sauce (optional)


  1. For topping, in a large saucepan combine vegetable stock and milk. Bring to boiling over medium-high. In a medium bowl mix polenta, nutritional yeast, salt, baking soda, and black pepper. Slowly add polenta mixture to saucepan, whisking constantly to break up any clumps. Reduce heat; simmer, stirring frequently for 20 minutes or until all liquid is absorbed and polenta is creamy.
  2. For filling, in a separate saucepan combine mushrooms, onion, bell pepper, and garlic. Cook over medium-low, stirring occasionally, until the liquid released by the mushrooms has cooked off, about 10 to 15 minutes. Add bay leaves, oregano, thyme, and 1½ cups vegetable stock. Cook over medium-low 20 minutes. Remove bay leaves. Using an immersion blender, pulse to break mushrooms into smaller pieces.
  3. In a small bowl, whisk together oat flour and ¼ cup of water; add to mushroom mixture. Add lentils, frozen vegetables, vinegar, parsley, and salt and pepper. Mix well. Cook until mixture thickens.
  4. Spread mixture evenly into a 9x13-inch baking dish. Top with a smooth layer of polenta.
  5. Bake at 350°F for 25 to 30 minutes, or until polenta begins to turn golden brown. Garnish with parsley. Serve with hot sauce, if desired.

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Leslie4 months ago
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This recipe is delicious. As I was making it, I wasn’t sure if it would turn out. I was afraid it would be pasty and dry. Wow, was I wrong! The polenta crust was crispy on top and creamy in the middle and the filling was hearty and just right. I will add this to my regular recipe list.

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