Heat olive oil in a large skillet over medium-high heat. Add gnocchi and cook, stirring frequently, for about 7-8 minutes, or until lightly browned. Remove from pan.
Add the sausage to the skillet, and cook until no longer pink.
Preheat broiler.
Add the diced tomatoes, garlic, basil, oregano, salt and pepper to the pan. Bring to a simmer. Return the gnocchi to the pan.
Stir in cream, and cook a few minutes more, until everything is heated through.
Top with Mozzarella cheese. Place skillet under broiler for about 2 minutes, or until cheese is melted an bubbly.
Sprinkle with fresh parsley before serving.