Bring a large pot of lightly salted water to a boil for the pasta.
Heat a medium skillet over medium heat and coat with cooking spray or 1 tablespoon olive oil.
Add the cubed chicken to the skillet and cook, turning occasionally, until browned and cooked through, about 3 to 5 minutes; season lightly with salt and pepper while cooking.
Add the diced onion and garlic to the pan and cook until the onion is translucent at the edges and the chicken is fully cooked, about 3 to 5 more minutes.
Stir in the canned diced tomatoes with their juices, dried basil (or fresh basil), 1/4 teaspoon salt, and the hot sauce; bring to a simmer and cook, stirring occasionally, until the sauce thickens slightly, about 6 minutes.
Meanwhile, cook the pasta according to package instructions until al dente, drain, and divide between two bowls.
Taste the sauce and adjust salt or hot sauce as needed, then divide the sauce over the two bowls of pasta.
Top each serving with Parmesan and optional fresh basil slices, then serve immediately.