Grate the potatoes and onion on the thin or large setting and place them in a large mixing bowl.
Add the rest of the ingredients and mix well until combined.
Add the oil into a large skillet, 1/2" high, and warm the oil on medium heat. Test the oil to make sure it’s ready by dropping a small drop of mixture to the oil. If it’s bubbling, the oil is ready.
Drop a soup spoon full of batter into the skillet and tap it gentle with the back of the spoon so it looks like a flat latke.
When the edges of the latkes are golden brown, flip them and continue frying.
Place on a platter lined with paper towels to absorb the extra oil.
Mix the sour cream with the dill and salt and serve.
Best eaten right away.