01 - Line a 12-cup muffin tin with paper liners or lightly grease silicone molds. Set aside.
02 - In a medium bowl, combine graham cracker crumbs, granulated sugar, and melted butter, stirring until the mixture resembles wet sand. Press approximately 1 tablespoon of the crumb mixture firmly into the bottom of each liner. Place the tin in the refrigerator to chill while preparing the filling.
03 - Using an electric mixer, beat the softened cream cheese in a large bowl until completely smooth and free of lumps. Add powdered sugar, vanilla extract, lemon zest, and ground lavender, then blend until fully incorporated.
04 - In a separate chilled bowl, whip the heavy cream to stiff peaks. Gently fold the whipped cream into the cream cheese mixture in two additions, preserving as much air as possible, until the filling is light, smooth, and fluffy.
05 - Spoon or pipe the filling evenly over the chilled crusts, dividing it among all 12 cups. Smooth the tops with a small spatula or the back of a spoon.
06 - Cover the muffin tin tightly and refrigerate for at least 4 hours, or until the filling is firm and set.
07 - Combine the 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, until the mixture thickens into a syrupy compote. Remove from heat and let cool completely.
08 - Just before serving, spoon the cooled blackberry compote over each mini cheesecake. Garnish with a sprig of fresh lavender or a whole blackberry if desired.