Fresh Mango Chutney (Corom Chatni)

This recipe is not original and I have not tried it. I have lost the source

1 med. slightly underripe mango
1 fresh jalapeno, sliced into thin rings
1 T finely chopped cilantro
1 T salt
1/8 t ground cayenne pepper

Cut the flesh of the mango away from the large seed inside. Cut the mango into paper-thin slices. Place in bowl. Add the chile, coriander, salt, and cayenne, and toss gently. Let the chutney marinate in the refrigerator for 1 or 2 hours before serving