tough while at the same time adding flavor.
SERVES 4
1 small onion, quartered
1 small carrot, peeled and roughly chopped
1 stalk celery, roughly chopped
2 anchovy fillets (optional)
2 medium cloves garlic
½ teaspoon dried oregano
Pinch of red pepper flakes
8 ounces button mushrooms, stemmed and quartered
10 ounces ground chuck
2 tablespoons extra-virgin olive oil