If you are doing your best to stay away from starchy veggies such as potatoes, then turnips are your best bet.
I'll be honest, we never ate turnips until recently because we never grew up eating them! We were surprised how these turned out - you'll not miss potatoes.
You can use any seasoning you want - we used Greek. You could also add a can of chick peas and roast it together with the turnips - yummy!
Enjoy these roasted turnips!