minecraft-assets/data/minecraft/recipes/dried_kelp_from_campfire_cooking.json

{
  "type": "minecraft:campfire_cooking",
  "category": "food",
  "cookingtime": 600,
  "experience": 0.1,
  "ingredient": {
    "item": "minecraft:kelp"
  },
  "result": {
    "id": "minecraft:dried_kelp"
  }
}