Amba recipe

As I wrote at my last post, I tried to find an Amba recipe.
After I checked many recipes in Hebrew, I discovered that in many recipes they ask you to use the amba spice, which is probably quite rare outside Israel. But I managed to find the following recipe for Iraqi style amba which is supposed to be good as well:

2 KG of cooked mango (it should be soft)
slice the mango to long, thin slices
put inside large bowl with water and lemon juice (out of lemon...)
a few hours later the mango is softer. add salt and curry spice. mix well.
If it's bitter- add more lemon and salt.
Let it sizzle in the jar for a few hours.
Put in the fridge.