Place the almonds and powdered sugar into a food processor and process for about 2 minutes until it forms into a sandy mixture. Add the rose water and process until a soft and smooth dough is formed, about 5 more minutes. 

Transfer the dough into a bowl and form small balls out of the dough (about 1 teaspoon each). Shape each ball into the shape of a triangle or strawberry using your index finger and thumb to create dimples on the sides and top of each ball.

Place the granulated sugar onto a plate. Dip each piece of marzipan into the sugar to coat on all sides. Poke a pistachio halve into the top edge of each piece of marzipan, as if it were the leaf on a fresh strawberry. Transfer the marzipan pieces onto a plate and serve.