Preheat the oven to 350 degrees F. Slice each pepper in half, length-wise. Onto a baking sheet, arrange the peppers in an even layer.
Into a large nonstick skillet over medium-high heat, crumble the sausage. Cook, stirring frequently for 5 minutes or until sausage is heated through and lightly browned. Set aside.
Into a medium-size mixing bowl add the cooked sausage, cream cheese, cheddar cheese, breadcrumbs, chives, garlic, and ground black pepper. Stir well to combine all ingredients.
Spoon the sausage and cheese mixture into each of the peppers.
Bake 15 minutes.
Switch the oven to its Broil setting on high heat.
Broil peppers for 1 minute, just enough to lightly crisp the tops, then remove from oven.
Serve warm or room temperature.