Creating Gluten Free Cheesy Potatoes is straightforward if you follow these steps closely:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Prepare Potatoes: Wash and peel the potatoes, then cut them into bite-sized cubes.
3. Boil Potatoes: In a large pot, cover the cubed potatoes with water and bring to a boil. Cook until tender but not mushy, about 10-15 minutes.
4. Drain Potatoes: Drain the potatoes and return them to the pot.
5. Mix Ingredients: In a large bowl, combine shredded cheddar cheese, sour cream, milk, garlic powder, onion powder, salt, and black pepper. Mix well until it’s smooth.
6. Combine: Pour the cheese mixture over the drained potatoes and stir gently until the potatoes are well-coated.
7. Transfer to Baking Dish: Pour the cheesy potato mixture into a greased 9×13 inch baking dish.
8. Top with Mozzarella: Sprinkle the shredded mozzarella cheese on top of the potato mixture for a deliciously cheesy crust.
9. Bake: Place the baking dish in the preheated oven. Bake for 30-35 minutes or until the cheese is bubbly and golden brown.
10. Garnish: Once out of the oven, you can sprinkle chopped green onions for a fresh touch.
11. Cool Slightly: Allow the dish to cool for 5-10 minutes before serving to let everything set.

By following these steps, you will create an amazing Gluten Free Cheesy Potatoes dish that everyone will love.