It really depends on the family and how traditional they are and the background. It's pretty varied over here.
Some families have big meals like roasts, some have brunches, some have the tradition of that's when they go out to the restaurants.
I've known Italian families that have big Italian dishes, while Mexican families have tamales and enchiladas, and the WASPS will go and have a fancy brunch.
Over here it really depends on who you are. There is no set tradition of Sunday meal.
In my family it was just a regular meal, like any other day. But one of my boyfriends in high school I was always invited over for a big roast or breakfast after they got back from church.
Since I'm a bit poorly today it will probably be soup and sandwich at this end. But I'm known to do a nice Yorkshire pud and roast at any time of the week
