Como renderizar dados associados

create_recipe.ex

defmodule RecipeBox.CreateRecipe do
  @moduledoc """
    Create a new Recipe
  """
  import Ecto.Changeset

  alias RecipeBox.{Recipe, Repo}
  
  def run(params) do
    %Recipe{}
    |> cast(params, [:title, :description, :quantity_people, :difficulty_level, :meal_id])
    |> validate_required([:title, :description])
    |> Repo.insert()
  end
end

recipe_controller.ex

defmodule RecipeBoxWeb.RecipeController do
  use RecipeBoxWeb, :controller

  def create(conn, params) do
    case CreateRecipe.run(params) do
      {:ok, recipe} ->
        conn
        |> put_status(201)
        |> render("recipe.json", %{recipe: recipe})

      {:error, _} ->
        conn
        |> put_status(422)
        |> json(%{status: "unprocessable entity"})
    end
  end
  
  #...
end
  

recipe_view.ex

defmodule RecipeBoxWeb.RecipeView do
  use RecipeBoxWeb, :view

  def render("recipe.json", %{recipe: recipe}) do
    %{
      id: recipe.id,
      title: recipe.title,
      description: recipe.description,
      difficulty_level: recipe.difficulty_level,
      quantity_people: recipe.quantity_people,
      meal: %{
        id: recipe.meal.id,
        title: recipe.meal.title,
        description: recipe.meal.description,
        active: recipe.meal.active,
        inserted_at: recipe.meal.inserted_at,
        updated_at: recipe.meal.updated_at
      }
    }
  end
end