Prep the cabbage leaves. Bring a large pot of salted water to a boil. Core the cabbage and gently peel off 12 large leaves. Blanch leaves for 2–3 minutes until pliable, then transfer to a towel-lined tray to drain.
Pat dry.
Sauté aromatics. Heat oil in a large skillet over medium. Add onion and bell pepper; cook 4–5 minutes until softened. Stir in garlic and cook 30 seconds until fragrant.
Brown the turkey. Add ground turkey, breaking it up with a spatula.
Cook until no longer pink, about 5–7 minutes. Season lightly with salt and pepper.
Add seasoning and sauce. Stir in the taco seasoning, tomato paste, salsa, and chicken broth. Simmer 3–5 minutes until thick and saucy.
Stir in lime juice and cilantro. Taste and adjust salt, pepper, or heat as needed.
Preheat and prepare the pan. Heat oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Spoon a thin layer of salsa or broth onto the bottom to prevent sticking.
Assemble the rolls. Lay a cabbage leaf flat, thicker stem end closest to you. Add 1/4–1/3 cup turkey mixture near the base, sprinkle with a little cheese, then roll up, tucking in sides like a burrito. Place seam-side down in the dish.
Repeat.
Bake. Cover the dish with foil and bake for 20 minutes. Remove foil, sprinkle remaining cheese over the top, and bake 5–10 more minutes until bubbly and lightly golden.
Finish and serve. Let rest 5 minutes. Garnish with cilantro, and serve with sour cream, avocado, extra salsa, and lime wedges.