Heat oil in large pot over medium heat. Add onions and garlic; saute until onions are soft, about six minutes. Add hot sauce and dressing. Simmer until sauce thickens, about 8-10 minutes. In a separate pot heat salted water until it boils and add pasta, cook according to package instructions. Drain and combine with sauce. Season with salt and pepper serve, passing parmesan cheese separately. 2-3 servings. 20-25 minutes preparation time