Here is the recipe, reprinted directly from the post linked above.
Yogurt Panna Cottas with Honey
As printed on www.seriouseats.com, Adapted from Food & Wine magazine
1 1/2 teaspoons unflavored gelatin
1 tablespoon water
1 cup fat-free milk
1/3 cup sugar
1 cup low-fat buttermilk
1 cup fat-free plain Greek yogurt
2 tablespoons honey
Red grapes, for serving
1. In a small bowl, mix the gelatin with the water and let stand about 5 minutes, until softened. In a small saucepan, bring the milk to a simmer with the sugar and cook until the sugar is dissolved, about 1 minute. Remove from heat and stir in the softened gelatin until dissolved.
2. In a medium bowl, whisk the buttermilk with the yogurt until smooth. Whisk in the warm milk mixture. Pour the panna cotta mixture into six 4-ounce ramekins and refrigerate until set, about 3 hours.
3. To serve, drizzle the panna cottas with honey and garnish with the grapes.