Start by making the enchilada sauce. Put the onion into a medium saucepan ... Add the garlic and red chilli and cook for a further 30 seconds. Remove from the pan and set aside.
Stir in the spinach and corn. Cook and stir until the spinach is wilted. Spread 1/2 cup enchilada sauce in a 3-quart shallow baking dish. Line the bottom of the baking dish with 6 tortillas ...