In a medium bowl, whisk together the eggs, heavy cream, and Old Bay seasoning. Season lightly with salt and pepper.
Heat the oil or clarified butter in a large skillet over medium-high heat.
Add the cooked potatoes and cook until crispy and golden on all sides, stirring occasionally.
Stir in the diced turkey ham and cook for about 1 minute.
Pour the egg mixture evenly over the potatoes. Cook over low heat, gently stirring only a little so the eggs begin to set without becoming dry.
Sprinkle the shredded cheese evenly across the top of the Cheesy Potato Egg Scramble.
Cover the skillet with a lid and cook over low heat for 3–5 minutes, or until the cheese has completely melted and the eggs are fully cooked.
Garnish with chopped fresh chives and serve warm with a spoonful of sour cream.