Prepare the Pan: Line a 13x9-inch casserole dish or quarter sheet pan with parchment paper. Ensure the paper hangs over the sides to act as handles for easy removal later.
Ready the Berries: Gently wash the strawberries and pat them completely dry with a paper towel. Remove the hulls and slice the berries into small quarters. Set aside.
Create the Base: In a medium mixing bowl, combine the low-fat Greek yogurt, agave nectar, and vanilla extract. Whisk firmly with a spatula until the mixture is smooth and the sweetener is fully incorporated.
Assemble: Pour the yogurt mixture into the center of the prepared pan. Spread it evenly toward the edges using the spatula, aiming for a uniform thickness of approximately ¼-inch to ensure even freezing.
Add Toppings: Scatter the strawberry quarters over the yogurt, pressing them down very lightly. Sprinkle the dark chocolate shavings and hemp hearts evenly across the surface.
Freeze: Place the dish on a flat surface in the freezer. Freeze for a minimum of 4 hours, or until the yogurt is solid all the way through.
Serve: Lift the bark out of the pan using the parchment paper handles. Place on a cutting board and break or cut into roughly 22 snack-sized pieces. Serve immediately.