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Cottage Pie with Sweet Potato Mash

Recipe by: Dr. Michael Greger & Robin Robertson from The How Not to Diet Cookbook
One of my favorite comfort foods. This warm, savory dish is just as flavorful with mashed cauliflower instead of the sweet potato topping, so mix it up if the mood strikes.
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Course Main Course
Difficulty Moderate
Daily Dozen Beans, Herbs and Spices, Other Vegetables

Ingredients
 
 

  • 2 pounds sweet potatoes, cut into 2-inch chunks
  • ½ teaspoon onion powder
  • ¼ teaspoon ground black pepper
  • 1 small red onion, chopped
  • 1 carrot, chopped
  • 2 garlic cloves, minced
  • 1 ½ cups fresh or thawed frozen corn kernels
  • 1 cup fresh or thawed frozen green peas
  • 1 cup cooked fresh or frozen lima beans
  • 2 cups cooked or BPA-free canned or Tetra Pak salt-free brown lentils
  • 1 cup Light Vegetable Broth
  • 8 ounces mushrooms of choice, chopped
  • 3 tablespoons nutritional yeast
  • 2 tablespoons salt-free tomato paste
  • 1 tablespoon white miso paste
  • 1 teaspoon minced fresh thyme, or 1/2 teaspoon dried

Instructions
 

  • Place the sweet potatoes into a large pot with enough cold water to cover and bring to a boil. Cook for 15 to 20 minutes, or until fork-tender, then drain and return to the pot. Stir in the onion powder and black pepper and mash until smooth. Set aside.
  • Preheat the oven to 400F.
  • Heat 1/4 cup of water in a large skillet over medium heat. Add the onion and carrot and cook until softened, about 7 minutes. Stir in the garlic and lower the heat to low. Stir in the corn, peas, and cooked lima beans. Cook until the vegetables are tender and any liquid is absorbed, 3-5 minutes. Stir in the 1 1/2 cups of the lentils, then transfer the vegetable mixture to a shallow baking dish and set aside.
  • Heat the Light Vegetable Broth in the same large skillet over medium heat. Add the mushrooms, nutritional yeast, tomato paste, miso paste, and thyme and cook, stirring, for 5 minutes, or until the mushrooms are soft. Transfer the mushroom mixture to a blender or food processor, add the remaining 1/2 cup of lentils, and blend until smooth. If the gravy is too thick, blend in up to 1/2 cup of additional broth. Taste and adjust the seasonings, if needed.
  • Pour the gravy over the vegetable mixture, stirring to combine. Spread the mashed sweet potatoes on top, smoothing to cover the surface. Bake for about 30 minutes, or until the filling is bubbling. Serve hot.