Finely chop onion, chorizo, and sun-dried tomato strips.
Place a few tablespoons of the sun-dried tomato oil into a pan, heat on medium to high burner.
Add onion, chorizo, sun-dried tomato, and garlic. Fry until golden brown, take off heat and set aside.
Peel potatoes and slice 3mm thick.
Spray medium sized baking dish with light oil.
Layer dish with potato, then onion mix, then a light dusting of french onion soup mix. Continue layering until you have three layers.
Pour light cream over layers until all covered.
Grate a good layer of parmesan cheese on top and place into a medium oven (180 degrees C) for approx 30-45mins – or until cheese is golden brown and potatoes are cooked through.