Prepare the Potatoes: Start by peeling the potatoes, then cut them into pieces. Place the potato pieces in a pot of salted water and bring to a boil. Cook until they are tender, which usually takes about 15-20 minutes.

Boil the Egg: While the potatoes are cooking, bring another small pot of water to a boil. Gently add the egg and cook for about 10-12 minutes for a hard-boiled consistency.

Cool the Egg: Once the egg is done, transfer it to a bowl of cold water to stop the cooking process. Allow it to cool for a few minutes.

Prepare the Meat Mixture: In a mixing bowl, combine the ground pork and beef. Season with salt and pepper to taste, mixing well to incorporate the flavors.

Assemble the Bird's Nests: Once the egg has cooled, carefully remove the shell and cut it in half. Take a portion of the meat mixture and fold it over each egg half, shaping it into a nest-like form.

Cook the Bird's Nests: Heat a knob of butter in a skillet over medium heat. Once melted, add the bird's nests and fry until the meat is cooked through and golden brown, about 5-7 minutes. Ensure to turn them occasionally for even browning.

Mash the Potatoes: While the nests are frying, return to the boiled potatoes. Drain them and mash them in a bowl. Add a pat of butter, along with salt and pepper to your liking, and mix until creamy and smooth.

Serve: Plate the warm, buttery mashed potatoes alongside the crispy bird's nests and enjoy your delightful dish!