Dice the Honeycrisp apple into uneven 1/3-inch pieces. Melt the unsalted butter over medium-low heat, about 325°F at the pan surface. Add the apple, fresh cranberries, light brown sugar, maple syrup, orange juice, orange zest, cinnamon, nutmeg and kosher salt. Fold with a silicone spatula every 60 seconds for 10 to 12 minutes. Next, press about one-third of the cranberries against the pan during the final 2 minutes. The berries should pop and the apple edges should turn translucent. The syrup will smell citrusy and coat the spatula in a thin ruby glaze. Go past 12 minutes and the sugars can scorch. Gentle heat softens the fruit without turning it into jam.

Keep the Brie chilled at about 40°F until the topping is ready. Set it in a 7-inch round ceramic baking dish. Score a shallow 1/8-inch circle across the top rind in 2 minutes. Spoon 3/4 cup of warm apple-cranberry mixture over the center, leaving a 1/2-inch border so the rind stays visible. Then, press the topping lightly so the fruit settles without sliding down the sides. The Brie should stay firm and the white rind should hold its round shape. If it sits warm longer than 10 minutes, the rind softens and tears during baking. Chilled Brie gives the topping time to heat before the wheel loses structure.

Bake the topped Brie at 350°F for 15 to 18 minutes. Rotate the baking dish 180 degrees at minute 10, then stop moving it. Check through the side with an instant-read thermometer. The center should reach 130°F to 135°F while the rind remains closed. (I tested 375°F first, the rind split before the center turned silky.) Meanwhile, the fruit glaze should bubble slowly and deepen from ruby to glossy mahogany. The wheel will tremble when the dish moves, and the top rind will look slightly puffed. Bake past 20 minutes and the cheese can burst into the dish. Moderate oven heat melts the center before the rind weakens.

Rest the baked Brie for exactly 5 minutes at room temperature, about 70°F. Cut one irregular wedge with one steady downward motion, then transfer it to an 8-inch round white plate. Spoon 2 tablespoons of apple-cranberry topping over the wedge. Add three water crackers and finish with fresh thyme leaves and one small rosemary sprig. Finally, the pale-gold cheese should flow slowly from the cut edge instead of flooding the plate. The topping will cling in uneven glossy clusters, and the herbs should smell fresh against the warm fruit. Skip the 5-minute rest and the center runs too fast. Resting lets the molten cheese thicken enough for clean serving.