NaturesAura/src/main/resources/data/naturesaura/recipes/altar/leather.json

{
    "type": "naturesaura:altar",
    "input": {
        "item": "minecraft:rotten_flesh"
    },
    "output": {
        "item": "minecraft:leather"
    },
    "catalyst": {
        "item": "naturesaura:conversion_catalyst"
    },
    "aura": 10000,
    "time": 50
}