01 - Line an 8x8-inch baking pan with parchment paper, allowing overhang on sides for easy removal.
02 - Combine granola, honey (or maple syrup), and melted coconut oil in a medium bowl until evenly mixed.
03 - Firmly press granola mixture into the bottom of the prepared pan, creating an even layer.
04 - Whisk together Greek yogurt, honey (or agave), and vanilla extract in a separate bowl until smooth.
05 - Spread yogurt mixture evenly over the pressed granola base.
06 - Distribute mixed berries over the yogurt layer. Sprinkle with chia seeds if desired for added texture.
07 - Transfer pan to freezer and chill for at least 4 hours or until completely solid.
08 - Lift frozen slab from pan using parchment overhang. Let sit 5–10 minutes to soften slightly, then cut into bars with a sharp knife.