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Sweet Potato Ground Beef Casserole

This Sweet Potato Ground Beef Casserole is one of those simple, comforting dinners that fills the house with good smells and fills bellies even better. Creamy mashed sweet potatoes on top, savory beef and veggies underneath, and a blanket of melty cheese to tie it all together. It is cozy, practical, and built for busy nights when you still want something that feels like home.
Print Recipe
Delicious shepherd's pie with ground beef, mashed potatoes, and melted cheese.
Prep Time:30 minutes
Cook Time:20 minutes
Total Time:50 minutes

Ingredients

For the mashed layer:

  • 2 medium sweet potatoes peeled
  • 1 medium potato optional, for texture
  • 1/2 cup milk
  • 2 tablespoons butter
  • 1 teaspoon salt
  • Nutmeg to taste
  • Pepper to taste

For the filling:

  • 1 pound 500 g ground beef
  • 1 cup onion diced
  • 1/2 cup red bell pepper diced
  • 1/2 teaspoon garlic powder
  • 1 teaspoon paprika
  • 1/4 teaspoon chili flakes
  • 1/2 teaspoon salt
  • 1 tablespoon white miso

For topping:

  • 1 1/2 cups shredded mozzarella cheese

Instructions

  • Step 1: Cook the sweet potatoes and potato - Peel the sweet potatoes and the potato, then cut them into large chunks. Bring a pot of salted water to a boil and cook the tubers for about 15 to 20 minutes until they are fork tender. Drain well and let the steam escape for a minute so the mash does not turn watery.
  • Step 2: Mash the potatoes - Add the milk, butter, salt, pepper, and nutmeg to the cooked potatoes. Mash until smooth and creamy. You can use a hand masher for a slightly rustic texture or blend for an extra smooth finish. Set the mash aside and give yourself a little pat on the back for already being halfway there.
  • Step 3: Cook the ground beef - Heat a large skillet over medium heat. Add the ground beef along with the salt, garlic powder, paprika, and chili flakes. Cook for about 5 to 6 minutes, breaking the meat up as it browns. You are building the flavor right here, so take a moment to really let those spices wake up.
  • Step 4: Add the vegetables - Stir in the diced onion and red bell pepper. Cook for another 5 to 7 minutes until the vegetables are soft and the beef is fully cooked. The kitchen should be smelling pretty good at this point. Add the white miso and stir until everything is evenly coated and savory.
  • Step 5: Assemble the casserole - Preheat your oven to 200 C or 400 F. Spread the beef and vegetable mixture evenly in a 6x10 inch baking dish or similar size. Sprinkle a small amount of mozzarella over the beef. Spoon the mashed sweet potato mixture over the top and gently spread it into an even layer. Finish with the remaining mozzarella cheese.
  • Step 6: Bake until bubbly - Place the dish in the oven and bake for 15 to 20 minutes until the cheese is melted, golden, and bubbling around the edges. Let it rest for a few minutes before serving so the layers can settle a bit.

Notes

Substitutions

  • Ground turkey: This works well if you want a lighter option with a similar texture.
  • Soy sauce: If you do not have white miso, a teaspoon or two of soy sauce adds that savory depth.
  • Dairy free milk and butter: These can be swapped in easily if you are avoiding dairy in the mash.

Variations

  • Vegetarian version: Replace the beef with cooked lentils or a mix of lentils and mushrooms for a hearty meat free option.
  • Extra veggie boost: Add grated carrot or chopped spinach to the filling for more color and nutrition.
  • Spicy version: Increase the chili flakes or add a few drops of hot sauce for a little extra heat.

Tips and Tricks

  • Season in layers: Season the mash and the beef separately so every bite is well balanced.
  • Do not rush the mash: Letting the potatoes steam off excess moisture keeps the topping fluffy and not watery.
  • Let it rest before serving: A short rest helps the casserole hold together better when you slice it.

Serving Ideas

  • Simple green salad: A crisp salad balances the richness of the casserole.
  • Steamed vegetables: Broccoli or green beans make an easy, healthy side.
  • Crusty bread: Perfect for scooping up any cheesy bits left on the plate.

Storage and Make Ahead Tips

  • Refrigerator storage: Store leftovers in an airtight container for up to four days.
  • Freezer friendly: Freeze unbaked or baked portions for quick future meals.
  • Reheating: Reheat in the oven for best texture or microwave for convenience.
Servings: 4 servings