A big Sunday tradition over here in the UK is the roast dinner.  People either cook one at home, or they go out to have one at a restaurant . . .  roast meat (beef, gammon, turkey, lamb, pork), with roast potatoes, veg, gravy etc.  Oh and Yorkshire puddings.  They're a must.   We never have a roast dinner on a Sunday.  By the time we get home from church and I call my  mom, etc., there just isn't the time and to be honest I am pretty tired by then.  So, I save our roast dinners for other days.  On Sundays, we usually have something which I have either remembered to put in the slow cooker before we left for church, or I whip up something quick like these Bacon & Cheese Omelettes.