Portobello Mushroom Bolognese Sauce

By djbinthecosmos

5.0 / 5

15min

3h 22min

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