Prepare the baking pan by lining it with parchment paper, leaving an overhang on the sides for easy removal later.
In a mixing bowl, combine graham cracker crumbs, sugar, and melted butter. Mix well until the crumbs are evenly coated. Press the mixture into the bottom of the prepared baking pan to create a crust layer, ensuring it's packed firmly.
In another bowl, whisk together Greek yogurt, honey (or maple syrup), lemon juice, and lemon zest until smooth and well combined.
Gently fold the fresh raspberries into the yogurt mixture, being careful not to crush them too much.
Pour the yogurt and raspberry mixture over the prepared crust in the baking pan, spreading it evenly with a spatula.
Cover the pan with plastic wrap and place it in the freezer for at least 3 to 4 hours, or until fully set.
Once set, remove the yogurt bars from the pan using the parchment paper overhang. Cut into 12 even squares or bars.
Serve immediately or store in an airtight container in the freezer for later enjoyment.