Preheat oven to 450ยบ F.
Place 1 cup pecans on a baking sheet. Drizzle with 3 tablespoons maple syrup and 1 teaspoon olive oil.
Sprinkle with 1 teaspoon fresh rosemary leaves and a few pinches of flaky sea salt. Toss to coat.
Bake for 3-5 minutes, or until pecans are bubbling and becoming aromatic. Remove from heat.
Slice apples 1/4 inch thick and top with a small slice of brie. Place on baking sheet.
Bake for 7-8 minutes. Top brie and apple wedges with pecans. Serve.