Peel the yucca and cut it into chunks.

Boil the yucca in a pot of salted water until it is tender, which should take about 20-25 minutes.

Drain the yucca and mash it with a potato masher or a fork.

Preheat the oven to 350°F (175°C).

In a mixing bowl, beat the eggs and add the butter, milk, parmesan cheese, sour cream, salt, and pepper.

Mix the mashed yucca into the egg mixture until it is well combined.

Grease a 9-inch pie dish with butter or cooking spray.

Pour the yucca mixture into the pie dish and smooth the top with a spatula.

Bake for 40-45 minutes, or until the top is golden brown and the pie is set.

Let the pie cool for a few minutes before slicing and serving.