1-First, place the diced Russet potatoes in a large pot with water covering them by a couple of inches. Bring to a boil, then simmer for about 15 minutes until tender, and drain them before letting them steam for 5 minutes in the pot. This step ensures the potatoes are fluffy and ready for mashing.

2-Next, cook the diced pancetta in a medium skillet over medium heat until crispy, which takes about 5 to 8 minutes, then drain it on paper towels and set aside. Meanwhile, mash the potatoes in the pot and add the garlic, dried sage, and butter, mixing everything well for that aromatic flavor.

3-Then, stir in the milk and grated Pecorino cheese, continuing to mash until the mixture is creamy and smooth. Mix in most of the crispy pancetta, saving some for garnish, and season with salt and pepper to taste. If the consistency needs adjusting, add a bit more milk.

4-Finally, serve the potatoes topped with the remaining pancetta, optional pancetta drippings, extra cheese, and fresh sage if you like. To adapt for dietary needs, use vegan cheese for a plant-based version or reduce butter for a lighter dish. The simple steps allow easy substitutions, making this Pecorino garlic mashed potatoes recipe versatile for everyone.