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Root Vegetable Gratin with Sweet Potatoes, Parsnips, and Beets

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A colorful and flavorful gratin featuring thinly sliced sweet potatoes, parsnips, and beets baked in a savory garlic-thyme cream sauce with a golden cheese topping.

Ingredients

Scale
  • 6 tablespoons extra virgin olive oil, divided
  • 3/4 pound medium beets, peeled and cut into 1/8-inch slices
  • 3/4 pound orange sweet potatoes, peeled and cut into 1/8-inch slices
  • 3/4 pound large parsnips, peeled and cut into 1/8-inch slices
  • 3/4 cup vegetable or chicken stock
  • 3/4 cup finely chopped shallots
  • 3 cloves garlic, minced
  • 2 tablespoons chopped fresh thyme leaves, divided
  • 1 teaspoon kosher salt, plus more to taste
  • 1/2 teaspoon pepper
  • 1/4 cup grated Parmesan cheese (optional)
  • 1 tablespoon thinly sliced chives (optional)

Instructions

  1. Brush a 3-quart shallow baking dish with 1 tablespoon olive oil.
  2. Arrange beets, sweet potatoes, and parsnips in separate rows by standing stacks of slices on edge so they fall and lay like overlapping tiles.
  3. Pour chicken stock over vegetables. Sprinkle with 1 teaspoon kosher salt and 1/2 teaspoon pepper.
  4. Preheat oven to 400° F.
  5. Heat a large skillet over medium heat. Add 5 tablespoons olive oil, shallots, and a pinch of salt. Cook, stirring often, until soft.
  6. Stir in garlic and cook about 30 seconds, until fragrant. Stir in 1 tablespoon thyme.
  7. Spoon shallot mixture evenly over vegetables in dish.
  8. Cover dish tightly with foil. Bake 45 minutes or until vegetables are tender.
  9. Remove foil and sprinkle with Parmesan cheese, if using.
  10. Return to oven for 5 to 10 minutes or until vegetables start to brown.
  11. Remove from oven. Sprinkle with remaining thyme and chives, if using. Serve warm.

Notes

Use a mandoline slicer for uniform thin slices to ensure even cooking. Covering the dish during baking helps soften the vegetables, while uncovering at the end allows the top to brown nicely. Optional Parmesan and chives add a savory finish.

Nutrition

Find it online: https://www.rapidrecipes.blog/root-vegetable-gratin-sweet-potatoes/