Creamy Fettuccine Alfredo with Hearty Ragu Sauce

Ingredients

• 1 tablespoon olive oil
• 1 medium onion, finely chopped
• 2 cloves garlic, minced
• 1 carrot, finely diced
• 1 celery stalk, finely diced
• 500g ground beef or a blend of beef and pork
• 400g canned crushed tomatoes
• 1 tablespoon tomato paste
• 1 teaspoon dried oregano
• Salt and pepper to taste
• 200g fettuccine pasta
• 50g unsalted butter
• 250ml heavy cream
• 100g freshly grated Parmesan cheese
• Freshly ground black pepper to taste