Heat vegetable oil in a large skillet over medium heat.

Add chicken, onion, and garlic to the skillet.

Sauté until the chicken is mostly cooked through, about 10 minutes.

Stir in the crushed tomatoes, mushrooms, and Italian seasoning.

Cook for about 5 minutes, stirring frequently.

Reduce heat and stir in the sugar.

Simmer for at least 15 minutes.

Meanwhile, bring a large pot of lightly salted water to a boil.

Add rotini pasta and cook until al dente.

Drain the pasta.

Serve the pasta topped with the chicken mixture and grated Parmesan cheese.