Sweet potatoes are common in stores where I live in MN. The root vegetables I bolded are found in bigger stores. The greens you mentioned are not. I visited by brother south of Chicago and they acted like they never heard of rutabagas. They have a slightly bitter taste which I like.
Long ago I worked in MI UP and saw signs for pastys outside stores. You can find them s far south as Minneapolis but rare. You can get them with or without rutbaga.
A pasty (pronounced "PASS-tee," not "PAY-stee" like the adhesive) is a traditional handheld savory pastry that originated in Cornwall, England, with a history stretching back centuries. It’s a semicircular parcel of dough filled with ingredients, folded over, and crimped along the edge to seal it before baking. The pasty is deeply tied to Cornish culture but has spread globally, especially to regions with Cornish immigrant communities like Michigan’s Upper Peninsula in the U.S., Australia, and parts of Mexico.
Miners’ Meal: The pasty’s design made it ideal for miners. The thick, crimped edge served as a handle, allowing workers with dirty hands to hold it without contaminating the food.
Filling: The classic Cornish pasty filling is raw beef (often skirt steak), diced or minced, with sliced potatoes, swede (rutabaga, called “turnip” in Cornwall), and onion, seasoned with salt and pepper. The ingredients are placed raw on one half of the dough circle, folded over, and crimped to seal.