I substituted baby kale for turnip greens, Beecher's smoked flagship for gruyere and did not peel the potatoes.
Unpalatable. The turnip greens were so bitter it ruined the entire dish. We ended up just eating the potatoes off the top with some other food I scrounged from the refrigerator. This dish was not worth the effort
Just a warning - this recipe takes a long time and a lot of prep, BUT it is so worth it! Baking everything with the Gruyere and cream makes it so good. I didn't peel my potatoes and that worked out fine. I also used lima beans instead of black eyed peas because I was craving limas, and lastly I added shredded rotisserie chicken because some in my audience were meat lovers. I would make this dish again - even without the chicken!