<recipetype:bloodmagic:alchemytable>.removeRecipe(<item:minecraft:leather>);

<recipetype:farmersdelight:cooking>.addRecipe("leather", <item:minecraft:leather>, [<item:minecraft:rotten_flesh>, <item:minecraft:rotten_flesh>], <item:farmersdelight:straw>, 1, 100);
<recipetype:farmersdelight:cooking>.addRecipe("rotten_flesh", <item:minecraft:rotten_flesh>, [<item:minecraft:oak_sapling>], <item:minecraft:oak_sapling>, 0, 400);