Pot Roast Vegetables.

Dearfolk,
Back when I used to eat at The Normaltown Cafe and later The Royal Cafe, one of the periodic lunch specials was Pot Roast. Both places would cook vegetables in with the meat: potatoes and carrots, primarily.
My curiosity is this: Mama's Boy is toying with the idea of a pot roast lunch special one day soon. What vegetables would YOU include in your medley of pot roast vegetables? I'd add a generous sampling of onions to the two veggies above; does anyone have interesting variations on how you would do it? Green peppers, maybe?
I'll check back here in a few daze to see what y'all have come up with. The possibility of regional variations has me endlessly wondersome.
Unroastingly, Ort. Carlton in Colder-Than-I-Would-Like Athens, Georgia.
P. S. I absolutely will not be thinking of including livermush in this! Lutefisk, perhaps....