Panna Cotta with Balsamic Strawberries

Ingredients

• 1 packet (2 teaspoons) unflavored gelatin powder
• 3 Tbsp cold water
• 3 cups heavy cream
• 2 cup plain whole-milk yogurt
• 1 ½ tsp pure vanilla extract
• 1 vanilla bean
• ¾ cup sugar
• 4 pints (8 cups) sliced fresh strawberries
• 5 Tbsp balsamic vinegar
• 2 Tbsp sugar
• ½ tsp freshly ground black pepper