Say I want to veganize, or at least de-dairify, Hrishikesh Hirway's mom's mango pie recipe, but not end up with liquid pie, like Hrishi did (even though that cooking failure inspired a new flavour of ice cream).

Condensed coconut milk? I'm not sure if that would make it vilely sweet, since like condensed non-coconut milk, there's a lot of sugar involved. I just enjoy pouring it over one or more peeled mangos and eating it.

(I can't digest several common vegan substitutions, so I am otherwise unlikely to be helpful with this question.)