PyQt5 get data from model to show custom widget in QListView

I'm using PyQt5 and trying to create a GUI with a list of some custom data structure (Recipe), and I defined a custom widget as a subclass of QWidget that describes how it should be displayed. I am trying to use MVC so I have a QListView and I subclassed QAbstractListModel. I want the list to contain my custom widget instead of just text, so I also defined an item delegate for it that returns that widget. Perhaps my understanding of exactly how these three components (model, item delegate, view) work together is flawed, because I'm not sure how to access whatever is returned from the data() method of the model and turn that into the particular widget I want to display in that list cell.

Example code:

class Recipe:
    pass # custom data structure

class RecipeWidget(QWidget, RecipeWidgetUI):
    def __init__(self, recipe, *args, **kwargs):
        super(RecipeWidget, self).__init__(*args, **kwargs)
        self.recipe = recipe
        self.setupUi(self)
        # some code here to populate the UI elements with data from self.recipe

class RecipeListModel(QAbstractListModel):
    def __init__(self, recipes, *args, **kwargs):
        super(RecipeListModel, self).__init__(*args, **kwargs)
        self.recipes = recipes
    def rowCount(self, index):
        return len(self.recipes)
    def data(self, index, role):
        if role == Qt.DisplayRole:
            return str(self.recipes[index.row()]) # this is the part I'm confused about

class RecipeItemDelegate(QItemDelegate):
    def __init__(self, parent):
        QItemDelegate.__init__(self, parent)

    def createEditor(self, parent, option, index):
        return RecipeWidget(recipe, parent=parent) # where do I get recipe from??

class MainWindow(...):
    def __init__(self, ...):
        ...
        self.model = RecipeListModel(recipes)
        self.listView.setModel(self.model)
        self.listView.setItemDelegate(RecipeItemDelegate(self.listView))

I know the data(...) function in the model is supposed to return a string; what I don't understand is:

• How do I instead return my Recipe data structure? Do I have to serialize it somehow and then deserialize later?
• Where does RecipeItemDelegate see what was returned by the data(...) function in order to properly construct the recipe object?