Heat the oil in a saucepan or saucepan over medium heat. Pour flour and stir for a minute. The mass should be homogeneous. Add basil, Italian herbs, pepper and salt and mix thoroughly.
Gradually add the cream, stirring constantly, and let the sauce boil. Pour in the milk and, while stirring, bring to the boil again.
Put the whole or sliced spinach, mix well and bring to a boil. Reduce heat and cook for 2–3 minutes. Add cheese and mix thoroughly.