This potato-tomato bake with Gruyère is a Mediterranean-style side dish made with thinly sliced potatoes, vine tomatoes, and a mix of Pecorino and Gruyère. Finished with a crispy breadcrumb topping, this potato-tomato recipe pairs well with various meats and fish and also makes an excellent vegetarian main.
3-4mediumyellow potatoesunpeeled and sliced into ¼" or thinner pieces
¾teaspoonkosher saltdivided (⅛ teaspoon for each potato and tomato layer)
Ground black pepper
2cupsGruyère cheeseshredded and divided into thirds
½cupgrated Pecorino Romano cheesedivided into thirds
5vine tomatoessliced into ¼" or thinner pieces (Note 1)
Bunch of fresh herbsminced (Italian flat-leaf parsley, thyme, or rosemary)
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Instructions
Preheat the oven to 375℉ and position a rack in the middle of it. Assemble the breadcrumb topping by mixing together the panko, garlic, Pecorino, and olive oil in a small bowl.
For the casserole, pour the 2 tablespoons of olive oil into the bottom of a 9x13 rectangular casserole dish or a 9" one. Layer some potato slices on the bottom, overlapping them. Sprinkle them with ⅛ teaspoon kosher salt and some pepper, and top them with ⅓ of the Gruyere, followed by ⅓ of the Pecorino. Top with the tomato slices and another ⅛ teaspoon kosher salt. Repeat this process for a total of 3 layers.
Cover the top layer of tomatoes with the seasoned Panko breadcrumbs, and drizzle them with a little extra virgin olive oil.
Place the dish, uncovered, on the middle oven rack. Bake for about 70 minutes, until the potatoes are fork-tender and the top is golden brown. Let it sit for 10-15 minutes before cutting. Garnish the panko topping with the fresh herbs. Enjoy!
Notes
Note 1: If the tomatoes are juicy, drain them on paper towels for a few minutes to avoid a watery base.General Notes:
Be sure the potato and tomato slices are cut no more than ¼" thick so they don't take too long to cook.
If the top begins to brown too much before the potatoes are done, cover the dish with foil to finish baking.
It's important to let this casserole sit for 10 to 15 minutes after it's done. Similar to lasagna, it needs time to set.