01 -
Trim the stem end of each eggplant. Using a mandoline, cut the eggplant lengthwise into 1/4-inch thick slices. You should have about 12 slices. Sprinkle the eggplant on both sides with kosher salt, layer them in a colander, and let stand for 1 hour.
02 -
Press the moisture from the eggplant and blot them dry with paper towels. Pour oil to a depth of 1 inch in a deep, heavy saucepan or large skillet and heat to 180°C (360°F). Place 3 to 4 eggplant slices in the hot oil and cook until they take on some color, 3 to 4 minutes. Using tongs, transfer the slices to a colander to drain. Repeat with remaining slices.
03 -
In a bowl, stir together the bread crumbs, ricotta, lemon zest, juice, thyme and salt until well combined.
04 -
Preheat the oven to 220°C (425°F). Spoon tomato sauce into a medium-sized baking dish till bottom is covered in a thin layer. Place a spoonful of filling at one end of each eggplant slice. Roll the slice around the filling and place it seam-side down in the dish on top of the tomato sauce. Spoon a tablespoon of cream over each roll to moisten. Bake until the edges of sauce are dark and the rolls are nicely caramelized, 20 to 25 minutes. Garnish with Parmigiano Reggiano before serving.