Heat a skillet over medium-high heat. Add the turkey bacon and cook until crispy, about 5-7 minutes. Transfer the bacon to the prepared baking dish.
Sprinkle half of the shredded cheese over the bacon in the dish. Then, gently place the torn croissants on top, leaving some gaps for the egg mixture to soak in.
In a large bowl, whisk together the eggs, half-and-half, chopped sage, rosemary, salt, black pepper, garlic powder, and onion powder. Pour this mixture evenly over the croissants in the dish. Sprinkle the remaining cheese on top.