When I was growing up, Sunday was roast day for us, too. Mom would put either a beef or pork roast on before we went to church, then add the vegetables, cook a side dish, and make the gravy after we got home. We always had a dessert, too...usually a homemade apple or cherry pie. The next day, mom would make stew out of leftover vegies, gravy, and some of the meat, and use the rest for meat spread, which my dad loved to take in his bucket. Occasionally she varied that by serving a baked ham and twice baked potatoes.
Nowadays, our Sunday dinner is an evening meal, cooked on the grill when weather permits.