01 - Set your oven to 425°F to prepare for baking.
02 - Heat olive oil in a large oven-safe skillet over medium-high heat. Add sausage and break up with a spatula. Cook until lightly browned, about 5 minutes. Add onion and garlic, sauté until softened, about 3 minutes.
03 - Stir in crushed tomatoes, chicken broth, dried oregano, red pepper flakes, salt, and black pepper. Mix until well combined.
04 - Add uncooked ziti pasta directly to the skillet. Push pasta down to submerge evenly in the liquid.
05 - Bring mixture to a boil, then reduce heat to medium-low. Cover and simmer 12–15 minutes, stirring occasionally, until pasta is just tender and most liquid is absorbed.
06 - Sprinkle mozzarella and Parmesan evenly over the pasta. Remove skillet from the stovetop.
07 - Transfer skillet to preheated oven and bake uncovered for 8–10 minutes, until cheese is bubbling and lightly golden.
08 - Remove dish from oven and allow to cool slightly. Garnish with fresh basil and serve hot.