01 -
Prepare the mashed potatoes and Italian meatballs with marinara sauce according to their respective recipes.
02 -
Preheat the oven to 350°F (175°C).
03 -
Lightly spray a 9×13-inch casserole dish with cooking spray to prevent sticking.
04 -
Spread the mashed potatoes evenly on the bottom of the casserole dish. Arrange the prepared meatballs evenly over the mashed potatoes.
05 -
Bake the casserole for 20 minutes until heated through.
06 -
Remove from oven, sprinkle shredded mozzarella evenly over the meatballs. Return to the oven and bake for another 10 minutes until the cheese melts and begins to brown.
07 -
Remove casserole from oven, garnish with chopped fresh parsley, and serve warm.