Set up a double boiler for gentle, even heating.
Cut the cheese into small, manageable cubes.
Combine all the ingredients, excluding the spinach, in the double boiler, and heat them until they meld together thoroughly. Stir consistently to ensure a smooth and even mixture.
Once the mixture is well melted, remove it from the heat source and introduce the spinach. Stir vigorously to ensure an even distribution.
You have two serving options at this point:
Serve the dip immediately.
For an extra touch, sprinkle a bit more Parmesan on top and place it under the broiler for one to two minutes to achieve a delightful golden finish.
Moreover, if you plan to keep it warm for an extended period, consider transferring it to a crockpot set to the "warm" setting.
Finally, present the dip alongside tortilla chips and savour the delicious flavours. Enjoy!