In a medium bowl, combine graham cracker crumbs and melted butter until the mixture resembles wet sand.
Press about 2 tablespoons of the crumb mixture into the bottom of 6-8 silicone cupcake liners or a lined muffin tin.
Use the bottom of a small glass to press the crumbs down firmly to create a solid crust.
In another bowl, gently whisk together the Greek yogurt, lemon curd, and lemon zest until smooth.
Spoon the lemon yogurt mixture over the crusts, filling each cup to the top.
Smooth the tops with a spoon or spatula.
Place the cups in the refrigerator for at least 2 hours (or the freezer for 45 minutes) to set.
Garnish with fresh berries or mint leaves before serving chilled.