01 - Line a 12-cup muffin tin with paper liners or arrange silicone molds on a flat baking sheet.
02 - Combine graham cracker crumbs, granulated sugar, and melted butter in a mixing bowl until the texture resembles wet sand. Press approximately 1 tablespoon of the mixture firmly into the bottom of each liner. Transfer to the refrigerator to chill while preparing the filling.
03 - Beat the softened cream cheese in a large bowl using an electric mixer until completely smooth. Add powdered sugar, vanilla extract, lemon zest, and ground lavender, then mix until fully incorporated and creamy.
04 - In a separate bowl, whip the heavy cream to stiff peaks. Gently fold the whipped cream into the cream cheese mixture in two additions, maintaining as much air as possible for a light, fluffy texture.
05 - Spoon or pipe the filling evenly over each chilled crust, filling to just below the rim of the liner. Smooth the tops with a small spatula.
06 - Cover the muffin tin tightly with plastic wrap and refrigerate for at least 4 hours, or overnight, until the filling is firm and set.
07 - Combine fresh blackberries, granulated sugar, and lemon juice in a small saucepan over medium heat. Cook for about 5 minutes, stirring frequently and gently mashing the berries with a spoon, until the mixture thickens into a glossy syrup. Remove from heat and let cool completely.
08 - Spoon the cooled blackberry sauce over each mini cheesecake. Garnish with a sprig of fresh lavender or a whole blackberry if desired, then serve immediately.