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1
Preheat oven to 350 degrees F (175 degrees C).
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2
Place bacon in a large oven-safe or cast-iron skillet and cook over medium-high heat, turning occasionally, until evenly browned, about 10 minutes. Drain the bacon slices on paper towels. When cool, crumble bacon; leave bacon drippings in the skillet.
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3
Whisk flour, kosher salt, and smoked paprika together in a bowl. Coat chicken thighs in the seasoned flour and brown on both sides in the hot bacon fat over medium heat, about 5 minutes per side; transfer chicken to a plate. Drain bacon grease except for 1 tablespoon; cook and stir onion and apple until onion is translucent and apple is softened, about 5 minutes. Stir red cabbage and bacon into onion-apple mixture, sprinkle with a pinch of kosher salt, and cook, stirring often, until cabbage is softened, 5 to 8 minutes.
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4
Pour red wine vinegar and red wine into skillet. Stir in brown sugar and cinnamon and bring cabbage mixture to a boil; cook until sauce is reduced by half, stirring often, about 10 minutes. Arrange chicken thighs on top of cabbage in the skillet.
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5
Bake in the preheated oven until cabbage is tender and chicken is cooked through, about 40 minutes. An instant-read meat thermometer inserted into the thickest part of a thigh should read at least 160 degrees F (70 degrees C).
