Plant id help - rutabaga or collards?

[Ook]

I have several of these popping up in my garden, and they are huge. I have grown rutabagas and collards in the past, but can't decide which this is. It looks more like a rutabaga, but it isn't developing a root.

Are rutabaga greens edible, and good tasting or are they not worth the effort to pick and cook?

[Gunner]

sure looks like collards.

Yes, rutabaga greens are edible just not as nutrient rich as others. Taste will depend on how good a cook you are:)