Rinse the strawberries and dry them completely, since the filling will not stick to wet berries.Cut off the leafy tops and use a strawberry huller or a small spoon to hollow out the center of each berry. Trim a tiny sliver from the pointed end so each strawberry stands upright.
In a medium bowl, beat the cream cheese with a hand mixer until smooth and creamy, about 1 minute.
Add the yogurt, protein powder, powdered sugar, lemon zest, vanilla and salt, then beat until thick, fluffy and completely lump free. If the filling feels soft, chill it for 15 minutes so it pipes into tall, defined swirls.
Spoon the filling into a piping bag fitted with a star tip, or into a zip top bag with one corner snipped off. Pipe the filling into each strawberry, filling the center and finishing with a swirl on top.
Gently dip the piped tops into the graham cracker crumbs so they look like mini cheesecakes.
Drizzle with the melted chocolate and chill for 30 minutes before serving. These are best enjoyed the same day, while the berries are juicy and the crumbs are still crisp.