First prepare the crust by crushing the almonds with the sugar in a food processor until finely ground. Add the oats & process again.
Add the melted vegan butter with the salt & process until it all comes together like wet sand.
Press into your tart mold(s) with a removable bottom then freeze while you prepare the custard. Or see notes for baking to make them crispy rather than raw/chewy
For the custard combine all the ingredients except for the vanilla extract in a medium sauce pot over medium to high heat & bring to a boil whisking frequently to avoid scorching the bottom .
Once it starts to bubble let it boil on low heat for about 10 seconds.
Add the vanilla extract then pour into the frozen crusts and refrigerate to cool and set, approximately 30 minutes
Decorate with your favorite fruits then brush with melted jam to seal the fruit & keep it shiny