To make a super quick and easy Pizza Sauce, I use the same trick I use in my Pizza Pinwheels recipe - simply add seasonings to store-bought marinara.  By adding a symphony of seasonings such as onion powder, dried basil, dried parsley, oregano garlic power and crushed red pepper to already prepared marinara, you get crazy good pizza sauce.  It is important that the pizza sauce be super flavorful because that is all the seasoning these Stromboli is going to get.  I will caution to not add crushed red pepper flakes if you are using Hot Italian Sausage or your Stromboli could be too spicy.