Cut the mango in half down the flat sides. Brush the flesh with oil and place the oiled side down on the grill grates.
Grill for 2-3 minutes until dark char marks have formed. Flip and continue cooking for another minute or two until marks have formed on the other side.
Peel off the skin, remove seed then transfer the flesh to a large food processor with the remaining ingredients. Blend until smooth or to desired consistency. Season with salt to taste.
Serve immediately or store in an airtight container in the refrigerator for up to 3 days.