First, peel and cut your mango into 1/2 inch / 1cm pieces, place in a small bowl, add salt, then toss to combine. Set aside.
In a saucepan with a lid (I use Staub's Perfect Pan here), add your olive oil and heat on medium. Once the oil has warmed add your garlic and chili, and cook until the garlic is just starting to change colour.
Now, add your spices and coat with the oil - heating for about a minute until they are fragrant. If you need to coat with a little more oil to form a paste, that's fine.
Once your spices are fragrant, add your water and vinegar,stirring to combine, then finally add your mango and salt mixture (along with any juices in the bowl). Mix well, then pop the lid on and allow to gently simmer for 10-12 minutes, or until just caramelised. Take off the heat and allow to cool.
Makes roughly 6 ounces / 170g of amba. This will keep for a week in the fridge.