Sorry, no amount of potato will ever count as a portion of veg.
The key things to remember are:
– Fruit or vegetable juice can only count for one portion a day, no matter how much you drink.
– Smoothies can count for a maximum of two, but make sure they contain enough whole fruit.
– Beans and pulses do count, but only for a maximum of one portion a day.
– Potatoes are generally used as the starchy item in a meal, so don't count. Sweet potatoes do though!