Ragú alla Bolognese

Heat olive oil and butter in a pan over medium-low heat and add the onion. Cook over medium-low heat until onion is just starting to turn brown. Add the celery and carrot and cover the pan. Cook, stirring occasionally until just starting to brown. Stir in the garlic and cook for 1 minute.

Turn up the heat to medium and add ground beef. Cook until meat is browned. Stir in the tomato paste and cook an additional minute. Stir in white wine and water, and season with salt and pepper.
Turn the heat to low and cover and cook for 1 ½ hours. Add additional water ½ cup at a time if the sauce seems to be drying out. Meat should be covered with sauce.

Serve over tagliatelle. ¡Que aproveche!