In a medium bowl, mix Greek yogurt, pistachio butter, chopped pistachios, honey, vanilla bean paste, and salt until creamy.
Line a baking sheet with parchment paper. Scoop 12 portions (about 2 tablespoons each) and flatten into ½-inch thick discs.
Freeze for about 1 hour, until fully firm.
Melt dark chocolate until smooth.
Dip each frozen disc into melted chocolate, allowing excess to drip off. Place back onto parchment and sprinkle with flaky sea salt if using.
Freeze 5–10 minutes until chocolate shell is firm.