Place the tomatoes, spaghetti, water, garlic, red pepper flakes, oregano and oil in a stockpot and bring to a boil. Reduce heat and simmer for 10 to 12 minutes, until the pasta is al dente, stirring occasionally.
Once the pasta is cooked, remove the pot from heat and stir in the basil, mozzarella and salt and pepper to taste. Serve with Parmesan if using.
Recipe courtesy of Alexandra Caspero