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Sweet Potato and Zucchini Casserole


  • Author: Jessica

Ingredients

  • Sweet Potatoes: 2 large, peeled and thinly sliced. Provides a natural sweetness and creamy texture, packed with Vitamin A and fiber.
  • Zucchini: 2 medium, thinly sliced. Adds a mild, fresh flavor and moisture to the casserole, a good source of Vitamin C and potassium.
  • Onion: 1 medium, thinly sliced. Contributes savory depth and aromatic base to the dish.
  • Garlic: 2 cloves, minced. Enhances the flavor profile with its pungent and savory notes.
  • Heavy Cream: 1 cup. Creates a rich and creamy sauce, binding the vegetables together. (Can substitute with coconut cream for a dairy-free option).
  • Milk: 1/2 cup. Thins the cream slightly for better sauce consistency, adds moisture. (Can use almond milk or oat milk for dairy-free).
  • Vegetable Broth: 1/4 cup. Adds a savory base to the sauce and extra moisture. (Low sodium recommended).
  • Shredded Cheese: 1 1/2 cups (such as cheddar, mozzarella, or Gruyere). Provides a melted, cheesy topping and enhances flavor. (Vegan cheese alternative can be used).
  • Parmesan Cheese: 1/4 cup, grated. Adds a salty, umami flavor and crispy topping. (Nutritional yeast can be used as a vegan alternative).
  • Dried Thyme: 1 teaspoon. Adds a subtle earthy and herbaceous flavor.
  • Dried Rosemary: 1/2 teaspoon. Complements the thyme with its piney and aromatic notes.
  • Salt: 1 teaspoon, or to taste. Enhances all flavors in the dish.
  • Black Pepper: 1/2 teaspoon, or to taste. Adds a touch of spice and depth.
  • Olive Oil: 2 tablespoons. Used for sautéing onions and garlic, adds healthy fats and flavor.

Instructions

  1. Preheat the Oven and Prepare Baking Dish: Preheat your oven to 375°F (190°C). Lightly grease a 9×13 inch baking dish with olive oil or cooking spray. This prevents sticking and ensures easy cleanup later.
  2. Sauté Onion and Garlic: Heat olive oil in a large skillet over medium heat. Add sliced onion and sauté for 5-7 minutes, until softened and translucent. Stir occasionally to prevent burning. Add minced garlic to the skillet and sauté for another minute, until fragrant. Be careful not to burn the garlic as it can become bitter. Sautéing the onion and garlic first brings out their natural sweetness and mellows their sharpness, creating a flavorful base for the casserole.
  3. Combine Sauce Ingredients: In a separate medium bowl, whisk together heavy cream, milk, vegetable broth, dried thyme, dried rosemary, salt, and black pepper. Whisk until all ingredients are well combined and the sauce is smooth. This creamy herb-infused sauce is the heart of the casserole, binding the vegetables and adding layers of flavor. Taste and adjust seasoning if needed, adding more salt or pepper to your preference.
  4. Layer Vegetables in Baking Dish: Begin layering the vegetables in the prepared baking dish. Start with a layer of thinly sliced sweet potatoes, overlapping them slightly to cover the bottom of the dish. Next, layer the sliced zucchini over the sweet potatoes, again overlapping slightly. Distribute the sautéed onion and garlic mixture evenly over the zucchini layer. Repeat these layers, sweet potatoes, zucchini, and onion/garlic, until all vegetables are used, ending with a layer of zucchini or sweet potatoes. Layering the vegetables ensures even cooking and distributes the flavors throughout the casserole.
  5. Pour Sauce Over Vegetables: Gently pour the prepared cream sauce evenly over the layered vegetables in the baking dish. Ensure the sauce is distributed throughout the casserole, reaching all layers. You can gently shake the dish or use a spoon to help the sauce seep down into the layers. The sauce should come up about halfway or two-thirds of the way up the vegetables.
  6. Add Cheese Topping: Sprinkle the shredded cheese evenly over the top of the casserole, covering the surface completely. Then, sprinkle the grated Parmesan cheese over the shredded cheese. The cheese topping will melt and create a golden brown, bubbly crust during baking, adding richness and a delightful cheesy flavor to the casserole.
  7. Bake the Casserole: Cover the baking dish with aluminum foil. This prevents the top from browning too quickly and allows the vegetables to steam and cook through properly. Bake in the preheated oven for 45 minutes.
  8. Remove Foil and Bake Until Golden Brown: Carefully remove the aluminum foil from the baking dish. Continue baking for another 20-30 minutes, or until the casserole is bubbly, the cheese is melted and golden brown, and the vegetables are tender when pierced with a fork. The baking time may vary slightly depending on your oven and the thickness of your vegetable slices.
  9. Let Rest and Serve: Once baked, remove the casserole from the oven and let it rest for 10-15 minutes before serving. This allows the casserole to set slightly, making it easier to serve and preventing it from being too watery. Resting also helps to distribute the flavors and allows the casserole to cool down to a comfortable serving temperature. Serve hot and enjoy!

Nutrition

  • Serving Size: one normal portion
  • Calories: 320
  • Fat: 22g