How to Make Bolognese Sauce

Melt butter with olive oil in a large saucepan over medium heat. Add onion, celery, carrot, and 1 pinch salt; cook and stir until onion turns translucent, about 5 minutes.

Stir ground beef into vegetables; cook and stir until meat is crumbly and no longer pink, about 5 minutes. Season with 1 1/2 teaspoons salt, nutmeg, cayenne pepper, and black pepper.

Pour milk into ground beef mixture and bring to a simmer. Cook, stirring frequently, until most of the milk has evaporated and the bottom of the pan is still slightly saucy, about 5 minutes.