Slice the potatoes into thin strips.
Soak the potatoes in cold water to remove the starch.
Slice carrots and bell peppers into strips as well.
Heat oil in a pan and sauté garlic.
Add the potatoes and carrots and stir-fry.
Season with salt and vinegar.
Add the bell peppers and quickly stir-fry.
Transfer the finished stir-fried potatoes to a plate.