Shred potato with the skins on.
Put shredded potato on a towel and spread out, sprinkle with 1/2 t of salt and let rest 10 minutes.
Squeeze out water by pulling up towel and making a ball of potato in the rag until the water is gone.
Heat up oil in a large skillet on medium-high heat.
Add grated potato and toss to incorporate with the oil.
Smush potato into the bottom of the skillet and make a pancake, spreading to the edge of the skillet.
Cook until the bottom is browned.
Flip gently, being careful not to splatter hot oil.
Lower heat to medium and cook for an additional 5 minutes.
Add ham and spinach.
Cook until the spinach wilted.
Add cheese over the top to melt.
Once melted, flip one side over the other like an omelette.
Make sure it's browned on both sides.
Remove from the pan and cut into 4 pie slices.
ENJOY!