01 - Peel and uniformly slice the ripe plantains into bite-sized segments. Submerge in salted water and boil for 10 to 12 minutes, or until tender. Thoroughly drain all excess water.
02 - Using a potato masher or fork, thoroughly mash the cooked plantains with the unsalted butter and salt until a smooth consistency is achieved. Allow the mixture to cool slightly.
03 - Take approximately 1 tablespoon of the plantain mash and flatten it in your palm. Center one mozzarella cube within the plantain and carefully enclose the cheese, forming a cohesive nugget or ball shape. Repeat this process for all remaining mozzarella cubes and plantain mixture.
04 - Working with each plantain nugget individually, first lightly roll it in all-purpose flour, ensuring an even coating. Next, dip it into the beaten eggs, allowing excess to drip off. Finally, coat thoroughly with panko breadcrumbs.
05 - Heat vegetable oil in a deep pan or deep fryer to 340°F (170°C). Carefully fry the breaded nuggets in batches to avoid overcrowding, for 2 to 3 minutes per batch, turning occasionally until they achieve a uniform golden-brown hue and become crisp.
06 - Remove the fried nuggets from the oil using a slotted spoon and drain them on paper towels to remove excess grease. Allow them to cool slightly before serving.