For this, take hamantaschen puff pastry shells, fill them with a spoonful of jam and then top with fresh fruit. Alternatively, you could fill them with vanilla pastry cream (or, more prosaically, vanilla pudding) and then top with fruit. Or you could put in a bit of jam, then vanilla pudding and then the fruit. Or you could fill them with lemon curd and then top with fruit. Or you could pipe in chocolate mousse . . . Well, you get the idea.
As in the above picture, you can dust the top of the tarts with powdered sugar. To make the fruit shiny, brush it with jam (raspberry for berries and apricot for other fruits). An easy trick for glazing the fruit is to put it in a bowl and toss it in a bit of corn syrup. This gives it a clear glaze and also makes the fruit a bit sticky, which helps bind the fruit pieces together.
Update: If you want to fill these with pareve (dairy-free) vanilla pudding, combine a box of Osem pudding mix with 3/4 cup of coconut milk. Fill each hamantaschen with a small spoonful of pudding mix and top with half a strawberry.
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