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1
Preheat the oven to 400F, with a rack in the upper third.
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2
In a medium saucepan, heat 1 tablespoon oil over medium heat.
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3
Add the onion and garlic, and cook, stirring, until soft and lightly golden, about 8 minutes.
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4
Add the tomatoes and salt, and cook, stirring occasionally, until the sauce has thickened, about 30 minutes.
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5
Stir in the vinegar, oregano, and basil; season with pepper.
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6
Remove the sauce from the heat.
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7
Meanwhile, heat a large cast-iron skillet or grill pan over medium heat.
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8
Lightly brush the eggplant slices with the remaining tablespoon oil.
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9
Working in batches, lay the slices in skillet in a single layer; cook until browned and beginning to soften, 2 to 3 minutes per side.
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10
Transfer to a plate.
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11
Spoon about 1/2 cup tomato sauce into a 9-inch-square baking dish, spreading to coat evenly.
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12
Arrange the eggplant slices snugly in a single layer.
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13
Spoon about 1 cup tomato sauce over the eggplant, and arrange the polenta rounds in slightly overlapping slices on top.
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14
Repeat with the sauce and another layer of eggplant.
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15
Finish by dotting with the remaining tomato sauce.
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16
Cover with foil; bake until bubbling and juicy, about 30 minutes.
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17
Remove the foil; continue baking until the sauce is lightly caramelized and the eggplant is tender, about 15 minutes more.
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18
Remove from oven; let cool slightly, and serve.
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19
(Per serving)
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20
Calories: 156
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21
Fat: 3g
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22
Cholesterol: 0mg
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23
Carbohydrate: 30g
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24
Sodium: 343mg
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25
Protein: 5g
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26
Fiber: 7g