Filetti Di Pomodoro (Tomato and Onion Sauce) from Mario's Restaurant - Bronx Little Italy | Arthur A

Ingredients

• Two 32-ounce cans plum tomatoes with liquid, preferably imported from Italy
• ¼ pound lard
• 3 cups thinly sliced onions
• 1/3-pound ham preferably prosciutto cut into very thin strips 1 ½ cups of ham
• Salt and freshly ground pepper to taste
• ½ cup freshly snipped basil leaves or 1 tablespoon dried crushed