Bring a large pot of salted water to a boil and cook the bowtie pasta according to package directions until al dente, about 10-12 minutes. Reserve 1/2 cup of pasta water, then drain.
12 ounces farfalle (bowtie) pasta
If you would like to cook both the pasta and sauce in the same pot, let the drained pasta rest in the colander until needed. No need to clean the pot before using for the sauce.
While the pasta is cooking, heat the extra virgin olive oil in a large pot over medium. Add the diced onion and cook, stirring occasionally, until softened and lightly golden, about 5-7 minutes.
2 tablespoons extra virgin olive oil, 1 cup diced yellow onion
Add the garlic and cook for 30-60 seconds, stirring constantly, until fragrant.
3 cloves garlic
Stir in the crushed tomatoes, kosher salt, black pepper, sugar, and dried oregano. Simmer gently, stirring occasionally, until slightly thickened, about 10-12 minutes.