For the chicken sausage: If raw, cook in the oven to an internal temperature of 160 degrees using a thermometer. If already cooked: Preheat a non-stick pan over medium heat and brown the chicken sausage slices on each side.
Rub an oven safe non-stick pan or small baking dish with butter.
Pour the cream into the pan and stir in the mozzarella. Crack the eggs into the pan and season with salt and pepper.
Bake for 12-15 minutes or until whites have just set, but yolks are still a little runny.
Remove eggs from oven and top with crumbled feta, crushed red pepper flakes (if using), and scallions. Serve with bread, chicken sausage, and nectarine.