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1
FOR THE SAUCE: Heat the oil in a Dutch oven (or large pot) over medium heat until shimmering.
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2
Add the onions and cook until softened but not browned, about 3 minutes.
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3
Stir in the garlic and cook until fragrant, about 30 seconds.
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4
Stir in the meat, 1 teaspoon salt, 1 teaspoon pepper and cook, breaking the meat into small pieces until the meat loses its raw color but has not browned, about 4 minutes.
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5
Stir in the cream, bring to a simmer, and cook until the liquid evaporates and only the fat remains, about 5 minutes.
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6
Stir in the tomato puree and drained diced tomatoes (and a splash of your favorite red wine if you feel so inclined).
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7
Bring to a simmer and cook until the flavors are blended, about 3 minutes.
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8
Season with salt and pepper to taste; set aside.
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9
FOR THE RICOTTA FILLING: Stir all the ingredients together until combined; set aside.
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10
TO ASSEMBLE THE LASAGNA: Spread 1 cup of the sauce over the bottom of a 13 by 9-inch baking dish (avoiding large chunks of meat).
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11
Place 3 noodles in a single layer.
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12
Spread each noodle with 1/3 cup of the ricotta mixture.
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13
Sprinkle with 1 cup mozzerella.
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14
Spoon 1 cup of sauce evenly over the cheeses.
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15
Repeat layering twice more.
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16
Place the remaining 3 noodles on top, cover with the remaining sauce, and sprinkle with 1 cup mozzerella and the Parmesan.
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17
TO STORE: Wrap the dish tightly with plastic wrap and then foil and refrigerate for up to 2 days or freeze up to 1 month. (If frozen, the casserole must be thawed completely in the refrigerator, about 24 hours).
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18
TO SERVE: Adjust an oven rack to the middle position and pre-heat to 400 degrees. Unwrap the dish and cover tightly with aluminium foil that has been sprayed with vegetable oil spray (or use nonstick foil). Place a rimmed baking sheet under the dish to catch any overspill. Bake until the sauce bubbles lightly around the edges, 30 to 40 minutes. Remove the foil and continue to bake until hot throughout and the cheese is browned in spots, 25 to 30 minutes longer. Let cool for 10 minutes before cutting and serving.
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19
TO SERVE RIGHT AWAY: Follow instructions above, reducing covered baking time to 15 minutes.
