Preheat oven to 375°F (190°C) and line a baking tray with parchment.
Slice jalapeños lengthwise and remove seeds.
In a bowl, combine brie, cream cheese, herbs, salt, pepper, and blueberries until blended.
Fill jalapeño halves evenly with mixture.
Sprinkle with crushed nuts or keto crumbs if desired.
Bake for 18–20 minutes until bubbly and golden.
Let cool slightly before serving.
