Step 1: Cook the Pasta

1. In a large pot, bring salted water to a boil.
2. Add the spaghetti and cook according to package instructions until al dente. Drain and set aside, reserving a little pasta water.

Step 2: Prepare the Bolognese Sauce

1. In a large skillet or saucepan, heat the olive oil over medium heat.
2. Add the chopped onion, carrot, and celery. Sauté for about 5 minutes until the vegetables are softened. Stir in the minced garlic and cook for another 30 seconds.
3. Add the ground beef (or beef and pork mixture) to the skillet. Break it up with a spoon and cook until browned, about 5–7 minutes. Drain excess fat if necessary.
4. If using, pour in the red wine and let it simmer for about 2–3 minutes until slightly reduced.
5. Stir in the crushed tomatoes, tomato paste, oregano, basil, salt, and pepper. Bring the sauce to a simmer and let it cook for about 15–20 minutes, stirring occasionally. If the sauce gets too thick, add a bit of reserved pasta water.

Step 3: Combine and Serve

1. Toss the cooked spaghetti with the Bolognese sauce until well combined.
2. Plate the spaghetti and garnish with fresh parsley and grated Parmesan cheese.
3. Serve hot with a side of garlic bread or a fresh salad.