Stuffed Pepper Casserole

Bring the mixture to a boil. Once boiling, cover the skillet and reduce the heat to a simmer. Cook for about 20 minutes, stirring halfway through, until the rice is tender and has absorbed the liquid.
Stir in about half of the shredded mozzarella and cheddar cheese until it melts and is fully incorporated with the beef and rice mixture.
Sprinkle the remaining cheese over the top of the casserole. Cover the skillet again and let the cheese melt. For a quicker method, place the pan under the broiler (if it is oven-safe) until the cheese is bubbly and melted.
Remove the skillet from the heat and serve immediately. Enjoy your delicious and comforting Stuffed Pepper Casserole!