Heat a large skillet over medium heat.
Cook the beef Italian sausage for 4–6 minutes until browned and fully cooked, breaking it into crumbles as it cooks.
Drain any excess grease if necessary.
Add the chopped bell pepper and onion. Cook for 3–4 minutes until slightly tender.
Stir in the diced tomatoes and vegetable juice.
Bring the mixture to a gentle boil.
Remove the skillet from the heat and stir in the instant rice until evenly combined. This Quick Italian Skillet Dinner comes together quickly once the rice is added.
Cover the skillet and let it stand for 5–8 minutes until the rice absorbs the liquid.
Sprinkle the mozzarella cheese evenly over the top.
Cover again for 2–3 minutes until the cheese has completely melted.
Serve immediately while hot.