Heat olive oil in a large pot over medium heat.
Add minced garlic and chopped onion to the pot and sauté for 3-4 minutes until softened and fragrant.
Pour in the crushed tomatoes and water, then stir in dried Italian seasoning, salt, black pepper, and red pepper flakes.
Add the ziti pasta to the pot and stir to combine, ensuring the pasta is submerged in the liquid.
Bring the mixture to a boil, then reduce heat to medium-low and simmer uncovered for 12-15 minutes, stirring occasionally, until the pasta is cooked and most of the liquid is absorbed.
Remove the pot from heat and stir in the shredded mozzarella cheese and grated Parmesan cheese until melted and well combined.
Sprinkle chopped fresh basil over the top before serving.