Preheat your oven to 325°F. While it heats, slice your baguette into 1/2-inch rounds and arrange them on a baking sheet. Toast in the oven for about 8-10 minutes until golden and crispy, then set aside on a cooling rack. Meanwhile, roughly chop the pecans into bite-sized pieces, chop the basil leaves, and zest the lemon. This mise en place keeps everything organized so you can focus on assembling the brie once it's toasting.
Place the wheel of brie cheese in a small baking dish or on a piece of parchment paper on a baking sheet. Arrange the sliced peaches on top of the brie, slightly overlapping them for a beautiful presentation. Sprinkle the chopped pecans over the peaches, then distribute the fresh thyme sprigs across the top. Drizzle the honey evenly over everything—I like to use a light hand here so the honey caramelizes rather than pools, creating those delicious sweet pockets throughout the cheese.
Bake the assembled brie at 325°F for 15-20 minutes, until the cheese is melted and slightly oozing at the edges but still holding its shape—you want it warm and creamy, not completely collapsed. Remove from the oven and immediately sprinkle with the chopped basil from Step 1, a pinch of flaky sea salt, and the lemon zest for brightness. The residual heat will gently wilt the basil and meld the flavors together beautifully.
Transfer the warm baked brie to a serving board or plate and surround it with the toasted baguette rounds from Step 1. Serve immediately while the cheese is warm and spreadable—the contrast between the creamy brie, sweet caramelized peaches, and crispy toasted bread is truly irresistible.