Save all items of an array to a Firestore array

Question

This function saves data into Firestore.

static func createRecipe(docId:String, ingredientsAmount:Int, ingredientsName:String, completion: @escaping (Recipe?) -> Void) {
        
let db = Firestore.firestore()
        
        db.collection("recipes").document(docId).setData(
            [
             "title":title,
             "ingredients": [
                ["amount": ingredientsAmount,
                 "name": ingredientsName]
             ]
            ]) { (error) in
             }
    }

I'm using Codable to parse the data from an external source. But I have only been able to save one item at a time from the ingredients array.:

                do {
                    let decoder = JSONDecoder()
                    let recipe = try decoder.decode(Recipe.self, from: data!)

                    let uuid = UUID().uuidString
                    
                    createRecipe(
                        docId:uuid,
                        title: recipe.title ?? "",
                        ingredientsAmount: Int(recipe.ingredients?[0].amount ?? 0), // How to save EVERY item in recipe?
                        ingredientsName: recipe.ingredients?[0].name ?? "", // How to save EVERY item in recipe?
                    ) { recipeURL in
                        print("success")
                    }
                }
                catch {
                    print("Error parsing response data: \(error)")
                }

I can tell that I'm parsing the JSON data successfully because the following outputs every item in the ingredients array:

                    for eachIngredient in recipe.ingredients! {
                        print(eachIngredient.name)
                        print(eachIngredient.amount)
                    }

How can I save every item in the ingredients array to Firestore?

Any guidance is much appreciated!