Steam potatoes for 30 - 45 minutes or until tender.
Transfer the hot potatoes into a separate mixing bowl. Add milk, salt, pepper and mashed.
Add in the butter and mixed into a smooth consistency.
Preheat oven at 200℃
Prepare 36 pieces aluminum muffin tins.
Filled the tins with about 1 1½ tbs of the Spicy Asam Tuna.
Cover the fillings with the mashed potatoes. Topped the mashed potatoes with some grated cheese.
Baked in the oven for 15 minutes.