No-Bake Greek Yogurt Cheesecake

Ingredients

• 1/2 cup butter
• 9 whole graham crackers
• 1/4 cup packed dark brown sugar
• 1/4 teaspoon sea salt
• 2 1/2 teaspoons unflavored gelatin
• 1 tablespoon cold water
• 3 (8 ounce) packages cream cheese, at room temperature
• 2 cups whole-milk Greek yogurt, at room temperature
• 1/2 pinch white sugar
• 1 tablespoon lemon juice
• 1 teaspoon lemon zest
• 1 pinch sea salt
• 1 teaspoon vanilla extract
• 4 cups fresh blueberries
• 3 tablespoons packed dark brown sugar
• 2 tablespoons poppy seeds
• 2 tablespoons lemon juice