Preheat the oven to 400 degrees and line two baking sheets with parchment paper.
Remove the puff pastry dough from the fridge and generously flour the countertop again. Roll the pastry dough out into a 13"x17" rectangle. (Keep checking to make sure it is not sticking to the countertop and add more flour.)
Once the dough has been rolled out, cut 9 equal smaller rectangles. Inside each of the 9 rectangles, using a knife, trace a smaller rectangle. Do not push the knife all the way through the dough and make sure to leave 3/4" to 1" margins around the outside of the rectangle. Once you've drawn the smaller rectangle, use a fork to prick inside that rectangle. This will keep the middle of the puff pastry from rising up while it's baking, while allowing the edges to rise up and contain the filling. Gently move all 9 rectangles to the baking sheets before filling them.
Once they're on the baking sheets, add 1 tbsp of whipped honey feta to the pricked smaller rectangle, smooth it out, and then over the top of it add 1 tbsp of the peach puree from earlier. After this, top each one with 3 peach slices.
Mix 1 egg with 1 tbsp of water and egg wash each danish including the peaches. Place both the baking sheets in the oven and set the timer for 12 minutes. After 12 minutes switch the trays around, placing the bottom on top, and top on bottom. Bake for another 12-13 minutes or until the danishes are a nice golden brown!
While the danishes are baking, make a glaze. In a small bowl, mix together 1/2 cup of powdered sugar, 2 tbsp of heavy whipping cream, and 1/2 tsp of vanilla.
Once the danishes are finished baking, remove them from the oven and cool them on a cooling rack. After they are fully cool, drizzle the vanilla glaze over the tops! Then sit back with a cup of coffee and a Whipped Feta Peach Danish and enjoy!