Solved Vanilla Recipe Override?

I've been trying to remove a recipe that is in the vanilla game itself but still allow the item to be crafted in a different way. Wasn't sure if it was even possible so decided to ask here.

I have tried 2 things so far. First being just making a new recipe that gives material.air that uses the same items as the normal recipe. This didn't work, it appears to always take the normal recipe with higher priority.

The second thing I tried was listening to the ItemCraftEvent and replacing it with air, but that also won't work for what I need, because it blocks crafting the item completely.

Just for example so it makes sense; Lets say I wanted to be able to craft an Iron Chestplate with Obsidian, but not the normal recipe with Iron Ingots. Anyone know if this is possible, or how to do such thing?