Melt your chocolate and pour about 1/2 tbsp chocolate into your silicone mold (about 6 cups). Place in freezer to set for at least 5 minutes. Slice banana and put 3 slices on top of the hard chocolate layer. Combine yogurt and protein powder in a small bowl, fill each cup with mixture and top with extra melted chocolate. Place in freezer for at least an hour. Top with flaky sea salt (optional) and enjoy! Store leftovers in freezer and let thaw for a few minutes when ready to eat.