Start by peeling and grating the potatoes. Place the grated potatoes into cold water to prevent browning.

Prepare the other ingredients: slice the sausages, chop the garlic, and prepare the eggs and seasoning.

Drain the potatoes well, removing as much water as possible.

Heat a mix of vegetable oil and butter in a large skillet.

Add half of the grated potatoes to the skillet, spreading them out to form an even layer.

Cover and let it fry for 5 minutes. Meanwhile, prepare the cheese, spring onions, and olives.

Layer the sausages, cheese, olives, spring onions, and sprinkle some black pepper.

Add the remaining grated potatoes on top and cover again. Fry for another 5 minutes.

Carefully turn over the casserole using a plate to ensure even cooking on both sides.

Finish with a few slices of butter on top for extra richness.

Serve hot and garnish with fresh parsley and more Parmesan cheese if desired.