Position 2 oven racks like you're setting up bunk beds for very flat roommates - one in the center of the oven and the top one 4 to 5 inches from the broiler heating element (close enough to get a tan, not close enough to burst into flames).
Preheat the oven to 400 degrees, which is coincidentally the same temperature as your kitchen will be after you realize you left the oven on all afternoon.
Have ready a large baking sheet, preferably one that hasn't been used as a makeshift sled or art canvas recently.
Place the pizza dough on the baking sheet like you're tucking in a very flat, circular child. Let it bake for 5 minutes or so.
Slice the white rind off the top of the brie, then scoop out the soft cheese and spread it over the crust , leaving a 1-inch margin on the edges because even cheese needs personal space.
Bake on the center oven rack for 5 minutes, just long enough to check your phone 47 times.
Remove the baking sheet from the oven (using oven mitts, unless you enjoy the crispy hand look) and preheat the broiler for 5 minutes while you contemplate your life choices.
Sprinkle the pizza with the basil like you're blessing this beautiful, bizarre creation.
Top with the cold watermelon cubes, because apparently we're living in a world where fruit goes on pizza and we're all just okay with that.
Use the Parmigiano-Reggiano shavings to cover the watermelon like you're tucking tiny cheese blankets over each cube.
Broil for about 3 minutes, until the Parmigiano-Reggiano melts and starts to brown (watch it like a hawk, or like a very concerned cheese parent).
Just before serving, sprinkle the black pepper over the pizza to taste, because even fancy fruit pizza needs a little kick in the pants.
Transfer to a cutting board and cut into wedges like you're dividing up a very expensive, very weird pie.
Serve hot while trying to explain to your guests that yes, this is indeed dinner, and no, you haven't lost your mind (probably).