Peel skin off of cucumber and chop off rough ends. Using the larger side of a box grater, shred cucumber into thin slices.
Once cucumber is shredded, take a few paper towels and squeeze out the majority of the water from the cucumber shreds. Place into bowl and set aside.
Then, take your sweet onion and follow the same steps as you did with the cucumber - use a box grater to shred into thin slices. Take a few paper towels and squeeze out the excess water from your onion shreds. Place into bowl with cucumbers.
Empty entire container of Tofutti sour cream into bowl with cucumbers and sweet onion. Stir to combine.
Season with salt and pepper to taste. Serve with salted potato chips.