In a mixing bowl, combine gelatin with boiling water. Stir until fully dissolved, about 2-3 minutes. Set aside to cool slightly.

Peel and chop mangoes, blend into a smooth puree measuring 1 cup.

In a saucepan, combine coconut milk, condensed milk, and dissolved gelatin mixture. Heat over low to medium heat, stirring until steaming but not boiling (3-5 minutes).

Taste and adjust sweetness with sugar if necessary. For texture, consider small mango chunks in the mixture.

Pour into serving bowls or molds, refrigerate overnight or for at least 4 hours to set.

Once set, let sit for 5 minutes at room temperature before serving. Top with diluted condensed milk and fresh mango.