Start by tossing the cooked penne pasta, shredded chicken, cottage cheese, and Greek yogurt in a large bowl. You will feel the creamy texture come together, and it will smell incredible as the ingredients mingle. Be careful not to over-mix, or you might break the pasta.
Stir in the ranch seasoning mix and Frank's hot sauce. Look for that vibrant color as the sauce coats the pasta, creating a mouthwatering aroma.
Fold in the mozzarella and sharp cheddar cheese for extra cheesiness. You will notice the dish's richness growing. Save some cheese for sprinkling on top.
Pour the mixture into a greased baking dish, spreading it evenly. The layers should look cheesy and delicious.
Scatter the chopped green onions over the top before it goes in the oven. This adds a nice freshness to the dish.
Pop the dish in a preheated oven and bake until it is golden brown and bubbly. Keep an eye on it; over baking can dry it out.