In a Dutch oven or heavy-bottomed pan, heat 3.5 tablespoons olive oil and 3.5 tablespoons unsalted butter over medium heat.
Add 1.5 cups finely diced yellow onion, stir, cover, and cook for 5-10 minutes until translucent.
Cook the Vegetables:
Stir in 1 cup finely diced celery and 1 cup finely diced carrot. Cover and cook for another 5-10 minutes until softened and slightly browned.
Add 3 crushed garlic cloves and cook for 1 minute.
Brown the Ground Beef:
Add 16 ounces ground beef, breaking it up with a wooden spoon. Increase to medium-high heat and cook for 10 minutes, until the beef is browned and no longer red.
Build the Sauce:
Stir in 2 tablespoons double-concentrated tomato paste and cook for 1 minute until the color deepens. Add 1 bay leaf, 1/4 teaspoon ground nutmeg, 1 teaspoon salt, and 1/2 teaspoon black pepper.
Deglaze and Simmer:
Pour in 1 cup dry white wine and 1 cup water. Stir to combine, scraping up any browned bits with the wooden spoon.
Reduce the heat to low, cover, and simmer for 1½ hours. If the sauce thickens too much, add a little water as needed.
Finish the Sauce:
Remove the bay leaf, stir in 2 tablespoons heavy cream, and adjust seasoning if needed.
Cook the Fusilli:
In a large pot of salted water, cook 1 pound fusilli pasta until al dente according to package instructions. Drain and toss with the Bolognese sauce.
Serve:
Top with freshly grated Parmigiano Reggiano and torn fresh basil. Enjoy!
Notes
Sear the meat properly: Use medium-high heat and avoid overcrowding to develop a deep, caramelized flavor.Deglaze the pan: Use white wine to lift all the browned bits off the pan for maximum flavor.Simmer low and slow: Let the sauce cook over medium-low heat to build depth and richness.Season gradually: Add salt and black pepper in stages to perfectly balance the flavors.