Step 1: Preheat the Oven

Preheat your oven to 400°F (200°C). This temperature ensures that the potatoes become crispy on the outside while remaining tender inside. Line a baking sheet with parchment paper to prevent sticking and make cleanup easier.

Step 2: Prepare the Potatoes

Scrub the potatoes thoroughly under running water to remove any dirt. Since the skin adds flavor and texture, peeling is optional. Dice the potatoes into even, bite-sized pieces to ensure they cook uniformly.

Step 3: Season the Potatoes

In a large mixing bowl, combine the diced potatoes with olive oil, ranch seasoning mix, salt, and pepper. Toss well until all the potatoes are evenly coated. If you’re adding diced cooked chicken or beef, mix it in at this stage.

Step 4: Roast the Potatoes

Spread the seasoned potatoes in a single layer on the prepared baking sheet. Avoid overcrowding, as this will help them roast evenly and develop a crisp exterior.

Place the baking sheet in the preheated oven and roast for 25-30 minutes, stirring halfway through. The potatoes should be golden brown and crispy on the edges.

Step 5: Add Cheese and Final Bake

Remove the potatoes from the oven and sprinkle shredded cheddar cheese and grated Parmesan cheese evenly over the top. Return the baking sheet to the oven and bake for an additional 5 minutes, or until the cheese is melted and bubbly.

Step 6: Garnish and Serve

Once out of the oven, transfer the potatoes to a serving dish and garnish with chopped fresh parsley, chives, or green onions for added flavor and color.