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

{
  "type": "minecraft:smelting",
  "group": "redstone",
  "ingredient": {
    "item": "minecraft:redstone_ore"
  },
  "result": "minecraft:redstone",
  "experience": 0.7,
  "cookingtime": 200
}