Grate the peeled sweet potato and place it into a large bowl
Grate the yellow onion and transfer it into a tea towel
Squeeze the liquid from the grated onion and then transfer the onion in with the sweet potatoes
Add 2 eggs, 1/3 cup of grated parmesan, 1/4 cup of all purpose flour and a pinch of salt and pepper
Mix until all of the ingredients are fully combined
Add 1/2 inch of vegetable oil into a wide skillet and place it over medium heat
Once the oil is heated, carefully drop about 1/3 cup of the hashbrown mixture into the hot oil and press it out evenly and fairly thin
Let the hashbrown cook for a few minutes undisturbed
Once the underside is golden brown, carefully flip the hashbrowns to the other side and sprinkle with salt
Cook until the second side is also golden brown
Transfer the crispy hashbrowns onto a cooling rack while you cook the remaining portions
Serve warm