#C Builder Pattern with nested objects

Hi I'm stuck with a problem.

I want to implement the builder pattern to make creating my objects easier. The problem I face has to do with nested object. The object I would like to create has a list of other objects in it, and I don't really have an idea on how to tackle it.

I want to be able to do the following (Simpler objects for example):

Receipt RestaurantReceipt = new ReceiptBuilder()
.withDate("value")
.withName("value")
.AddItem("value")
    .WithIngredients("value")
    .WithType("value")
.AddItem("value")
    .WithIngredients("value")
    .WithType("value")
.build();

Or something like:

Receipt RestaurantReceipt = new ReceiptBuilder()
.withDate("value")
.withName("value")
.AddItem("value", item => {
  .WithIngredients("value")
  .WithType("value")
})
.AddItem("value", item => {
  .WithIngredients("value")
  .WithType("value")
})
.build();

Example should be representative for my situation, although if got more than one type of nested object.

Thanks in advance.