Here are some ways to describe it in English:
* Dried Alphonso mango: This is the most accurate and descriptive way to refer to it.
* Mango pieces: This is a more general term and might not distinguish it from other types of dried mango.
* Dried mango: This is the broadest term and might not be specific enough.
You can also use the Hindi word "mamra" itself, as it is becoming increasingly recognized in English-speaking communities due to the popularity of the product.