Place the grated potatoes in a towel and squeeze out as much moisture as possible.

Place potatoes in a medium bowl and add scallions, eggs, flour and salt and pepper.  Heat a small non stick frying pan over meidum-high heat.  Spoon a large portion of latke and flatten with a fork. Make one large latke at a time.  Once browned, flip over and cook until done.  Remove to a plate and cut into pieces.  Serve with sauce.

Make the sauce:

Combine all ingredients and whisk to blend.