Despite the simplicity of this tart — the only ingredients are three vegetables and a few seasonings — it delivers big flavor in a beautiful package.
The secret is in the layering. Yukon Gold potatoes, onion and butternut squash are sliced paper-thin, then arranged layer upon layer in a pan.
As you stack, chopped fresh herbs are sprinkled between those layers, then the whole thing is roasted until the vegetables are buttery-tender.
The result is a delicious tart that is vegan, yet filling. A mandoline is the best choice for getting the vegetables paper-thin. If you don’t have one, use a food processor fitted with the thinnest slicing attachment.
And if you prefer, sweet potatoes can be substituted for the Yukon Gold.
ROASTED BUTTERNUT AND HERB TART
Start to finish: 21/2 hours (30 minutes active)
11/2 tablespoons chopped fresh thyme
11/2 tablespoons chopped fresh oregano
11/2 tablespoons chopped fresh rosemary
11/2 teaspoons garlic powder
11/2 teaspoons kosher salt
1/2 teaspoon ground black pepper
4 large Yukon Gold potatoes, peeled
1 large yellow onion
1 medium butternut squash, peeled and seeded
Olive oil cooking spray
Heat the oven to 375 degrees. Coat a deep 7- or 8-inch round springform pan with cooking spray.
In a small bowl, mix together the thyme, oregano, rosemary, garlic powder, salt and pepper. Set side.
Use a mandoline or food processor to slice the potatoes, onion and squash as paper-thin as possible. Keep the vegetables in separate piles.
Arrange a single layer of potato slices, slightly overlapping, over the bottom of the prepared pan. Spritz with cooking spray, then sprinkle a pinch of the seasoning blend over them. No need to season heavily.
Top the potatoes with a few onion slices. The onion will break into thin rounds. This is fine. You don’t need a full layer, just a scattering of slices. Top the onions with a single layer of butternut squash slices, slightly overlapping. Use your hand to gently but firmly compress the layers. Spritz the squash slices with cooking spray, then sprinkle a pinch of seasoning over them.