That must be disappointing. Sounds like it should be good.
Here’s what I might try, if it looked feasible: turn it into turkey-stuffed peppers.
You could halve, clean, and parboil (5 min.) 3 or more bell peppers, cook some rice or quinoa, and combine it with the turkey stuff along with some chicken or turkey broth and maybe a little vegetable oil, and some (but not much) tomato sauce or tomato juice. Pile it into the pepper halves. Spread some shredded cheese on top. Give it half an hour in the oven at 350.
Instead of parboiling the peppers, you could just arrange them in the oven dish and pour the extra chicken broth into the dish around them.
One advantage of the halved peppers is that they hold their shape. If your turkey mixture is falling apart, you probably don’t have the right glue-to-crumbles ratio, and giving it containers can help. Next time, go a little easier on the additions—breadcrumbs, chopped vegetables—and see if it holds together better. You probably also need some vegetable oil.
I’m not one of those fearless, inventive cooks either, so trust your own instincts. @Kardamom could probably help, but she doesn’t do meat.