Its easy for people living in India to get Pudina, Karipattha or Corriander Leaves from the market. But this is not so for people living abroad due to the lack of regular supplies and also they will be costlier.

So, to use them without wasting, we can dry them. If you have Microwave Oven, put these leaves (of same type i.e. donot mix them) on a Microwave Oven Safe plate and keep for 5-10 seconds. Remove them, mix them and repeat. Otherwise, on a flat surface, spread them over a towel (possibly under a fan) until they become crispy. You should be able to crush them as if you would crush a Papad.

Crush them with your hands and store in containers. Use them at any dish you would put those leaves. You would get the Aroma as if you had used the real one.