Bring a large pot of salted water to a boil and cook the bowtie pasta according to package directions until al dente; drain and set aside.
Heat the olive oil in a large skillet over medium-high heat, add the diced Vidalia onion, and sauté for 3 to 4 minutes until the onion begins to soften.
Add the extra-lean ground beef to the skillet and cook, breaking it up with a spatula, until no longer pink and fully cooked through, stirring occasionally.
Stir in the minced garlic and dried oregano and cook for about 1 minute, stirring nearly constantly, until fragrant.
Pour in the tomato sauce, add the cooked pasta to the skillet, and stir until everything is evenly combined and heated through; season with salt and pepper to taste.
Optionally stir in or sprinkle the chopped fresh basil, evenly sprinkle the grated Parmesan over the top, and serve immediately.