NGUI Adding OnClick delegate through script?

[Tripwire]

So I was doing some coding and I need to add an OnClick delegate through function, because the button is a prefab. Only to find out the documentation isn't really helping here. I've tried doing:
Documentation:

1. UIEventListener.Get(gameObject).onClick += MyClickFunction;
2.  

My code

1. public void FoodItemClicked(GameObject go)
2. {
3.         Debug.Log ("Clicked");
4. }
5.  
6. for(int x = 0; x < FoodList.Count; x++)
7. {
8.         GameObject clone = Instantiate(ProductListItem, ProductListItem.transform.position, Quaternion.identity) as GameObject;
9.         SetParent (clone);
10.         clone.transform.localPosition = new Vector3(0, 276 - (100 * listCount), 0);
11.         clone.GetComponentInChildren<UILabel>().text = FoodList[x].ToString();
12.         UIEventListener.Get(clone).onClick(clone) += FoodItemClicked; /*<- This line*/
13.         listCount++;
14. }
15.  

The FoodItemClicked function is in the same script as the for loop.
As stated in the Documentation I shouldn't need to add a GameObject to the OnClick function but since it's a Void Delegate which needs a GameObject Go I figured this should be it. Now i'm getting an error message stating the following:

Assets/Scripts/Managers/Product Search/ProductSearchManager.cs(51,52): error CS0019: Operator `+=' cannot be applied to operands of type `void' and `method group'
Assets/Scripts/Managers/Product Search/ProductSearchManager.cs(51,52): error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer

I'm doing something wrong what I can't figure out

[lzt120]

UIEventListener.Get(clone).onClick+= FoodItemClicked;