Prep the oven and pan: Preheat to 375°F (190°C). Lightly grease a 9x13-inch baking dish with cooking spray or a little olive oil.
Cook the bacon: Pan-fry or bake until crisp.
Drain on paper towels, then crumble. Set aside and reserve a bit for topping.
Steam the veggies: Lightly steam broccoli or riced cauliflower until just tender-crisp. Drain well to prevent a watery casserole.
Make the creamy base: In a large bowl, whisk Greek yogurt, cottage cheese, cream cheese, and chicken broth until mostly smooth.
Small bits are fine.
Season: Stir in ranch seasoning, garlic powder, onion powder, smoked paprika, pepper, and salt. Taste and adjust salt if needed.
Add the mix-ins: Fold in shredded chicken, most of the bacon, 1 cup cheddar, mozzarella (if using), and the steamed veggies. Add half the green onions.
Assemble: Spread the mixture evenly into the baking dish.
Sprinkle the remaining 1/2 cup cheddar on top. Add pork rinds or panko if using.
Bake: Bake uncovered for 18–22 minutes, until hot and bubbly around the edges and the cheese is melted.
Finish and serve: Top with remaining bacon and green onions. Let rest 5 minutes, then scoop and serve.