Bring a large pot of salted water to a boil and cook the bowtie pasta according to package directions; drain and set aside.
While the pasta cooks, heat the olive oil in a large skillet over medium-high heat.
Add the diced Vidalia onion to the skillet and sauté 3 to 4 minutes, until it just begins to soften.
Add the extra-lean ground beef and cook, breaking it up with a spatula, until no longer pink and cooked through, stirring occasionally.
Stir in the minced garlic and dried oregano and cook about 1 minute, until fragrant.
Pour in the tomato sauce, add the cooked pasta, 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 and evenly sprinkle the grated Parmesan over the top before serving.