Gravy is what Italian-Americans call tomato sauce, the three-hour kind with enough meat to feed a small country. My mother makes a huge pot of it every Sunday. It isn't so much about cooking as it is about connecting with her heritage. She likes knowing that generations of her maternal ancestors spent their Sunday mornings stirring what they called 'ragu' in their own kitchens. Even when we ate Sunday dinners at Nonna's, my mother made her own gravy before we went. She'd give half the pot to me to bring to the city, and before the end of the week we had each used up our share for lasagne, sausage-and-pepper sandwiches, baked stuffed peppers, and veal parmigiana.