StrohiZock

First of all: I am from Germany, so there may be grammar mistakes in my post. Please excuse me. Hey, I wanted to create a new crafting-recipe. It is really easy: By putting a knife (an item of my mod) and a potato in crafting field, you get 4 potato wedges (another item of my mod). But after klicking on the stack, the knife and the potato disappear. I do not want this, because it is very expensive if you need 1 knife for 4 potato wedges. Instead of losing the knife, I just want to get it back or stay in the crafting-field. Just like the crafting-recipe for a cake, where you get three buckets back. After searching @ source and google, I was not able to find how they made it. Does anyone know how to get an item back after crafting?