Peel and chop the mangoes and freeze for 6 hours or overnight or use packaged frozen mango chunks.
Fresh lime juice is a must in this recipe.
If you don't have mango nectar, you can substitute fresh orange juice, pineapple juice, homemade simple syrup or even water.
If you don't have agave nectar, feel free to substitute with honey, maple syrup or sugar.
If you are going to use water instead of mango nectar, I would recommend adding additional sweetener.
Tamarind straws are a fun garnish but completely optional.