Trying to create an instance and multiple related instances in a many to many relationship

I am attempting to create an instance and multiple related instances with a many to many relation using a junction table.

While creating the multiple related instances, I need to add a value to a property on the junction table as well. I don't know if it is my lack of knowledge of sequelize or promises that is causing my problem.

The code I am using is below. This code does add the items to the database, but I need to redirect after the operation has completed, which is not working.

Basically, I need to create a Recipe. Once that is created, I need to create Ingredients and relate them to that Recipe. The ingredients are stored in an array coming from a form on an HTML page. While relating the Ingredients, I need to add the ingredient_quantity to the RecipeIngredients table, which is the through part of the relationship (the junction table).

global.db.Recipe.belongsToMany(
    global.db.Ingredient, 
    { 
        as: 'Ingredients', 
        through: global.db.RecipeIngredients, 
        foreignKey: 'recipe_id' 
    });
global.db.Ingredient.belongsToMany(
    global.db.Recipe, 
    { 
        as: 'Recipes', 
        through: global.db.RecipeIngredients, 
        foreignKey: 'ingredient_id' 
    });

router.post('/new', ensureLoggedIn, bodyParser.json(), function (req, res) {
    var recipeName = req.body.recipe_name;
    var steps = req.body.steps;
    var ingredients = req.body.ingredients;
    var ingredientQty = {};
    var currentIngredient;
    var ingredientsToAdd = [];

    db.Recipe.create({
        recipe_name: recipeName,
        directions: steps,
        FamilyId: req.user.FamilyId,
        CreatedBy: req.user._id
    })
    .then(function (recipe) {
        for (var i = 0; i < ingredients.length; i++) {

            currentIngredient = ingredients[i];
            ingredientQty[currentIngredient.ingredient_name] = 
currentIngredient.quantity;

            db.Ingredient.findOrCreate({
                where: { 
                    ingredient_name: currentIngredient.ingredient_name, 
                    FamilyId: req.user.FamilyId 
                }
            })
            .spread(function (ingredient, created) {
                if (created) {
                    console.log("Added Ingredient to DB: " + 
                    currentIngredient.ingredient_name);
                }

            ingredient.Recipes = {
                ingredient_quantity: 
                    ingredientQty[ingredient.ingredient_name]
            };
            ingredient.CreatedBy = req.user._id;
            recipe.addIngredient(ingredient)
            .then(function () {
                console.log("Added Ingredient " + ingredient.ingredient_name 
                + " to Recipe " + recipe.recipe_name);
            });
        })
    }

})
.finally(function(recipe){
    res.redirect('/recipes');
});
});

Any help would be greatly appreciated. I know that I am running into issues because of trying to use promises inside of a loop, I just don't know how else I can accomplish this.

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