01 - 
                Boil the potato chunks in a pot of salted water until tender, about 15-20 minutes. Drain and mash until smooth.
              
              
              
                02 - 
                In a mixing bowl, combine the mashed potatoes, glutinous rice flour, water, and sugar. Mix until a smooth and elastic dough forms.
              
              
              
                03 - 
                Divide the dough into small, equal-sized balls.
              
              
              
                04 - 
                Heat oil in a frying pan over medium heat. Flatten each dough ball slightly and fry in batches until golden brown on both sides, approximately 3-4 minutes per side.
              
              
              
                05 - 
                Remove the mochi from the pan and drain excess oil on paper towels.
              
              
              
                06 - 
                Drizzle with soy sauce and sprinkle with sesame seeds and chopped green onions, if desired.
              
              
              
                07 - 
                Serve warm and enjoy.