Rigatoni with White Bolognese

Name: Rigatoni with White Bolognese
Ingredients: Extra virgin olive oil; 1/2 yellow onion, chopped; 2 carrots, finely chopped; 1 celery stalk, finely chopped; Sea salt; Freshly ground black pepper; 1 pound sweet Italian sausage, removed from casings; 1 pound ground beef (not lean); 1 1/2 cups dry white wine; 1 cube beef bouillon dissolved in 2 cups simmering water; 1 1/2 ounces dried porcini mushrooms rehydrated in 3 cups lukewarm water; 1/3 cup heavy cream; 1 pound rigatoni; 3/4 cup freshly grated Parmigiano-Reggiano cheese