Crispy Bubble Potatoes

Prick potatoes all over with a fork and place on a microwave-safe plate. Microwave on High, flipping once, until tender and cooked through, 10 to 12 minutes. Let cool for about 5 minutes. 

Remove the skin from the potatoes; finely chop the skin and transfer to a large bowl. Mash the potato flesh using a potato masher (or press through a ricer); add to the bowl. Stir in mochiko, potato starch, garlic powder and pepper; knead the mixture until a dough forms. 

Add enough oil to equal a depth of 1 inch in a Dutch oven or other heavy-bottomed pot. Heat over medium heat to 350°F. (Alternatively, see air-fryer instructions, below.)

Meanwhile, shape the dough into a 1 1/2-inch wide log and cut into 3/4-inch pieces (about 20 pieces). Press a fork into each piece to create a crosshatch pattern. Add about one-third of the potatoes to the oil; cook, flipping often, until golden-brown, 5 to 7 minutes. Transfer to a paper-towel-lined plate; sprinkle with salt. Repeat with the remaining 2 batches of potato pieces.  

Transfer the potatoes to a serving plate. Sprinkle with chives and paprika, if desired.