AUTUMN TIAN - MARTHA STEWARD - BEET/POTATO BAKE

Autumn Tian - Martha Steward - Beet/Potato bake image

Number Of Ingredients 6

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1 pound beets (about 3 medium), preferably a mix of red, golden, and Chioggia, trimmed and scrubbed
1 medium onion, thinly sliced
6 tablespoons extra-virgin olive oil
1 tablespoon fresh thyme leaves
1 pound Yukon Gold potatoes (about 2 medium), peeled and cut into 1/4-inch slices
1 pound plum tomatoes (about 3), cut crosswise into 1/4-inch slices

Steps:

Preheat oven to 400 degrees. Wrap beets tightly in parchment-lined foil. Roast on a baking sheet until tender, about 1 hour, 20 minutes. Let cool completely. Peel and cut crosswise into 1/4-inch slices.
Increase oven temperature to 425 degrees. Toss onion with 1 tablespoon oil and half of thyme. Season with salt and pepper and arrange in the bottom of a 3-quart round or oval gratin dish. On a cutting board, stack 1 slice each potato, beet, and tomato. Season with salt and pepper. Repeat with remaining vegetables, keeping each stack separate. Transfer stacks to dish and shingle to overlap slightly. Sprinkle with remaining thyme and drizzle with 2 tablespoons oil. Cover tightly with parchment-lined foil.
Bake 30 minutes. Uncover; drizzle with remaining 3 tablespoons oil. Bake, uncovered, until vegetables are tender and tomatoes are caramelized, about 35 minutes more. Let cool slightly before serving.