Combine the blueberries and honey in a microwave-safe bowl and heat for 30-60 seconds until the berries begin to soften and release their juices. Remove from the microwave and mash the berries with a fork into a thick, chunky sauce—you want some texture remaining, not a completely smooth purée. This warming technique helps the honey integrate with the berries while the mashing creates the ideal consistency for binding with the goat cheese.
Stir the lemon juice, lemon zest, vanilla, and salt into the warm blueberry mixture from Step 1. Mix thoroughly to distribute all the flavors evenly throughout the sauce. These bright, aromatic additions will complement the tartness of the goat cheese beautifully. Let the mixture cool for about 15-20 minutes at room temperature or in the refrigerator until it's cool to the touch but not fully set.
Cut the goat cheese into small chunks (about 1/2-inch pieces) and fold them gently into the cooled blueberry mixture from Step 2 until everything is combined but still chunky—you want distinct pieces of goat cheese visible, not a completely smooth spread. Add the fresh thyme leaves and fold to distribute. I find that folding rather than mixing keeps the texture interesting and allows the flavors to stay distinct. If the mixture seems too soft to handle, refrigerate it for 15 minutes until it firms up slightly.
Place the goat cheese mixture onto a piece of plastic wrap and gently shape it into a log about 2 inches in diameter and 5-6 inches long, using the plastic wrap to help you mold it. Fold the plastic wrap around the log, twisting the ends tightly to seal. Transfer to the refrigerator for 2-4 hours, or to the freezer for 30-45 minutes if you're in a hurry, until the log is firm enough to slice cleanly. The chilling allows all the flavors to meld and the mixture to set into a beautiful presentation.
Remove the chilled log from the refrigerator or freezer about 10 minutes before serving to bring it to room temperature, which allows the goat cheese to become spreadable again. Unwrap the log and place it on a serving board or small platter. Slice into 1/2-inch thick rounds or serve whole for guests to spread onto crackers. The room temperature temperature allows the creamy tang of the goat cheese to shine while the blueberry-thyme sauce provides a beautiful sweet and herbaceous contrast.