Ragu alla Bolognese

Name: Ragu alla Bolognese
Prep time: 15 min
Cook time: 1 h 30 min
Total time: 1 h 45 min
Cuisine: Italian
Ingredients: 1 pound ground beef ((15% fat)); ½ pound ground veal; ½ pound ground pork; 1 cup red wine (+ more if needed it); 1 carrot (peeled and diced); ½ medium yellow onion (peeled and diced); 2 garlic (peeled and hard end removed); 2 tablespoons olive oil; 1 tablespoon unsalted butter; salt and pepper (to taste); 2 bay leaves; 1 teaspoon granulated sugar; 1 ounce dried porcini mushrooms; 4 cups San Marzano plum tomatoes; 1 tablespoon tomato paste