"When Clinton Kelly posted a pic of this Rolled Lasagna on his Instagram, his followers BEGGED for the recipe—so we asked him to share it!..."
INGREDIENTS
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2 tablespoons butter
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1 tablespoon olive oil
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1 medium onion, finely chopped
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2 ribs celery, finely chopped
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2 carrots, finely chopped
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1 pound ground beef (80% to 85% lean)
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Kosher salt and freshly ground black pepper
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¼ teaspoon freshly ground nutmeg
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1 cup whole milk
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1 cup dry white wine
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One 28-ounce can diced tomatoes
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2 tablespoons butter
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2 tablespoons flour
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2 cups whole milk, warmed on stovetop
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Kosher salt and freshly ground black pepper
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Freshly grated nutmeg
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One 28-ounce can crushed tomatoes
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6 tablespoons butter
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1 onion, peeled and halved through root end
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Salt and pepper
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Fresh lasagna sheets
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Béchamel, cooled
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Bolognese, cooled
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1 pound fresh mozzarella, grated
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1 cup grated Parmigiano Reggiano cheese, plus more for serving
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Red sauce, at room temperature or warm
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Chopped flat-leaf parsley, for garnishing (optional)