Preheat oven to 400F and spray a sheet pan with oil or brush on oil to grease.
Cut chicken breast into bite sized cubes and place in a large mixing bowl. Place gnocchi in the mixing bowl with the chicken.
Open the can of diced tomatoes and pour over a strainer to drain excess liquid. Discard liquid and pour diced tomatoes into the mixing bowl.
In a small bowl whisk together the tomato paste, oil, balsamic vinegar, salt, basil, oregano, and crushed red pepper. Pour the mixture into the large mixing bowl and toss to coat the chicken and gnocchi in the wet mixture.
Pour the mixture onto the greased sheet pan. Spread into an even layer. Place in the oven to bake at 400F for 15 minutes.
Cut fresh mozzarella into small cubes. Remove the sheet pan from the oven after 15 minutes and increase the heat to 475F. Sprinkle mozzarella cheese pieces over the pan and return to the oven to bake at 475F for 5 minutes.
Remove from the oven, garnish with basil and parmesan cheese and serve.