You will need
Instead of wilting the spinach in a saucepan, cook it in a microsteamer in the microwave.
Wash the spinach well in cold water to remove all possible grains of sand. Place the wet leaves into a saucepan over medium heat. Cover with a lid and wilt the spinach for 5 minutes. There is enough water clinging to the leaves to prevent it from burning.
Chop the wilted spinach in a processor. Add the cold Sauce and blend in with a few on/off pulses in the processor. Season to taste. Reheat in the microwave and serve.
Use Ina Paarman’s Ready to Serve Cheese Sauce in place of Mushroom Sauce.