In a large enamel-coated cast-iron skillet, cook bacon over medium heat until crisp, 8 to 10 minutes. Remove with a slotted spoon and let drain on paper towels.
To same skillet, add potatoes and onion; cover and cook for 15 minutes, stirring occasionally. Uncover and add bell pepper, salt, and black pepper. Cook, stirring occasionally, until tender and golden brown, about 2 minutes.
Stir in turkey, cooked bacon, sage, and vinegar; cook, stirring occasionally, until heated through, about 3 minutes. Serve warm. Garnish with black pepper and sage, if desired.
Recipe by Louisiana Cookin' at https://louisianacookin.com/turkey-hash/