Portobello Mushroom Bolognese Sauce
1 carrot, quartered 1 large stalk celery, halved 1 onion, quartered 1 tablespoon vegetable oil, or to taste 2 (15 ounce) cans whole tomatoes, or more to … 4 large portobello mushrooms, stemmed salt to taste ¼ cup milk ¼ teaspoon ground nutmeg ½ cup water ½ cup white wine