In a large bowl, add flour and butter. Use your fingers to rub it into the flour. Continue until the butter is incorporated and about pea-sized (it's okay if there are some larger chunks). Add your water, starting with 75g. Use a fork to combine. Add the remaining water, if necessary, until the dough comes together.
Transfer the dough to a lightly floured surface, and mix just enough to form a ball. Do not knead or overwork (this isn't bread).
Shape into a disc and wrap in plastic wrap. Chill for at least 1-2 hours, or overnight.
Assemble your galette
Line 2 baking sheets with parchment paper, and preheat oven to 400 °F
Transfer chilled dough to a lightly floured surface. Roll out so it's a little thinner than if you were making pie. Using a pie or pizza cutter, cut out 8 squares (4 x 4").
Evenly divide the goat cheese among the 8 squares. Placing it in the centre and gently spreading it out a little, but be sure to leave room around the edges.
Place 2-4 beet slices on top of the goat cheese. Again, leave a little room for a crust.
Working with one galette at a time, fold the edges over the beets. Gently press down to seal where the dough overlaps. Brush an egg wash over the edges of each galettes.
Evenly divide the crumbled blue cheese among the galettes. If you don't love blue cheese, you might not end up using all of it. Sprinkle with a little flakey salt and transfer to the oven.
Bake for 15-20 minutes or until golden brown.
Let cool for 5 minutes before garnishing with fresh time and a drizzle of hot honey.