Ingredients: 1 carrot, chopped,1 stalk celery, chopped,4 to 5 cloves garlic, very finely chopped,1 lb lean ground meat (beef, pork, turkey or chicken),3 tablespoons olive oil, divided,1 medium onion, chopped,1/2 teaspoon dried oregano,Parmigiana-Reggiano for grating,Salt and freshly ground black pepper,10 ounces thin spaghetti,2 cups diced tomatoes
Course: lunch,main course,main dish,dinner